The potential for confrontation between the United States and Iran, stemming from ongoing tensions over Iran’s nuclear program and western covert actions intended to delay or degrade it, remains a pressing concern for U.S. policymakers. The Saban Center for Middle East Policy hosted a one-day crisis simulation in September that explored different scenarios should a confrontation occur.

The Saban Center's new Middle East Memo, A Series of Unfortunate Events: A Crisis Simulation of a U.S.-Iranian Confrontation, authored by senior fellow Kenneth M. Pollack, presents lessons and observations from the exercise.

Key findings include:

• Growing tensions are significantly reducing the “margin of error” between the two sides, increasing the potential for miscalculations to escalate to a conflict between the two countries.

• Should Iran make significant progress in enriching fissile material, both sides would have a powerful incentive to think short-term rather than long-term, in turn reinforcing the propensity for rapid escalation.

• U.S. policymakers must recognize the possibility that Iranian rhetoric about how the Islamic Republic would react in various situations may prove consistent with actual Iranian actions.

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With violent protests following the second anniversary of the Egyptian revolution, and calls for a new unified government amid dire comments about the stability of Egypt, the world’s attention is again on President Morsi and his country. This follows a tumultuous period last month, when Egyptians went to the polls and ratified a new constitution. The document, criticized as hurried, incomplete, and lacking in consensus is enormously contentious.

In the Saban Center’s newest Middle East Memo, The View From a Distance: Egypt’s Contentious New Constitution, nonresident fellow Mirette F. Mabrouk gives a broad overview of the new constitution, and provides context and analysis for specific sections.

Mabrouk outlines several ways in which, she argues, the document is shaky on the protection of freedoms and rights, particularly those of women, some religious minorities and minors. Mabrouk also encourages analysts to stop viewing this situation as an Islamist/ secular divide, arguing that idea is too simplistic, and lacks the context for greater understanding of Egypt’s domestic politics.

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• The View From a Distance: Egypt’s Contentious New Constitution

The crisis in Syria continues with no end in sight, and in the Saban Center's latest Middle East Memo, Breaking the Stalemate: The Military Dynamics of the Syrian Civil War and Options for Limited U.S. Intervention, Saban Center Senior Fellow Kenneth Pollack argues that until there is a breakthrough on the battlefield, there will be no breakthroughs at the negotiating table.

In his paper, Pollack lays out the military advantages and disadvantages of both the opposition and the regime's forces, and looks at how different opportunities for U.S. intervention can affect those critical dynamics. This analysis provides a much-needed counterpoint to the debate over the possible cost of U.S. options in Syria with an analysis of their likely impact on the conflict.

Highlights include:

• The strengths and weaknesses of the opposition, including: greater numbers, a history of deprivation of political power, the aid of Islamist militias affiliated with the Muslim Brotherhood and Salafist groups, and support from Arab and Western countries.
   
• The strengths and weaknesses of the regime, including: motivation to defend against a determined majority, a geographic advantage, the remnants of the Syrian armed forces, help of foreign contingents like Hizballah, and the support of foreign countries like Iran and reportedly Russia and China.
   
• Options for U.S. interventions to break the stalemate, including:

  • Training and equipping the opposition.
  • Stopping the resupply of the regime in order to diminish its ability to generate firepower.
  • Attacking regime infrastructure targets, such as military bases, power-generation plants and transportation choke points like bridges.
  • Establishing and maintaining a no-fly zone.
  • Engaging in a tactical air campaign against regime ground forces.

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• Download the paper

Last September, as part of its annual conference with the United States Central Command, the Saban Center for Middle East Policy at the Brookings Institution conducted a day-long simulation of a confrontation between the United States and Iran arising from a hypothetical scenario in which the Syrian opposition had made significant gains in its civil war and was on the verge of crushing the Assad regime.  

The simulation suggested that, even in the wake of President Rouhani’s ascension to power and the changed atmosphere between Tehran and Washington, there is still a risk of misunderstanding and miscalculation between the two sides.

This new Middle East Memo examines the possible U.S. foreign policy lessons that emerged from this crisis simulation, and stresses the importance of communication, understanding the Saudi-Iran conflict and the difficulty in limited interventions. 

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• Hard Road to Damascus: A Crisis Simulation of U.S.-Iranian Confrontation over Syria

This summer, the world has watched as an al Qaeda offshoot, the Islamic State group, launched a militant offensive into Iraq, seizing large swaths of land. This Center for Middle East Policy’s Middle East Memo, Kurdistan Rising: To Acknowledge or Ignore the Unraveling of Iraq, examines how the fall of Iraq’s key city of Mosul has changed matters for Kurds in Iraq, and the necessity for American policymakers to take stock of the reality of the Kurdistan Region in this “post-Mosul” world.

Highlights: 

• A look at the Kurds of Iraq, their history and how the United States has largely spurned a partnership with them. Having been autonomous in Iraq since 1991, the Kurds heeded the aspirations of the United States in 2003 to assist in the removal of the Baath regime of Saddam Hussein, and played by the rules of the game established in the post-2003 period, albeit unwillingly at times. However, they have consistently refused to follow a path that would result in relinquishing the powers they enjoy. They have even taken steps to extend their autonomy to the point of having economic sovereignty within a federal Iraq, thus bringing them into serious dispute with Baghdad and the government of Nouri al-Maliki and earning the rebuke of the United States.

• An examination of how, since 2011, failed U.S. and European policies aimed at healing Iraq’s sectarian and ethnic fissures have contributed to the current situation. By so strongly embracing the concept of Iraq’s integrity as crucial to American interests in the region, key allies and partners have been marginalized along the way.

• Policy recommendations for the United States and its western allies, given that the Kurdistan region now stands on the threshold of restructuring Iraq according to its federal or confederal design, or exercising its full right to self-determination and seceding from Iraq. By ignoring the realities of Kurdish strength in Iraq, U.S. and European powers run the risk of losing influence in the only part of Iraq that can be called a success story, and antagonizing what could be a key ally in an increasingly unpredictable Middle East.

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• Kurdistan Rising: To Acknowledge or Ignore the Unraveling of Iraq

“Social security is not going broke,” said Carolyn Colvin, acting commissioner of the Social Security Administration, at a Brookings Retirement Security Project event this week. She was joined by Consumer Financial Protection Bureau Director Richard Cordray to discuss retirement planning and to unveil a new retirement calculator. “Social Security is the only guaranteed monthly income for a majority of older consumers,” Cordray said.

After their keynote addresses, a panel of retirement security experts moderated by Guest Scholar Joshua Gotbaum discussed efforts to improve retirement planning and what knowledge the average American needs to make retirement planning achievable. Ted Gayer, VP and director of Economic Studies at Brookings, introduced the event.

Here are 10 facts about Social Security and retirement planning mentioned during the event. Full video is available below and on the event’s page.

1/3 of U.S. households spend all of their available resources in every pay period

60 million people received Social Security benefits in September 2015

For the average worker, Social Security replaces only about 40 percent of pre-retirement earnings

45 million people are already 65 or order, and 10,000 people are turning 65 each day

The average American now spends about 20 years in retirement
(in 1950, the average was about 4 years)

4 in 10 Americans aged 51-59 are reaching retirement with limited or no savings,
and are projected to face a saving shortfall

~2/3 of the 40 million Americans 65 and older who receive Social Security benefits
depend on those benefits for ½ or more of their retirement income

It’s about 70 percent or more of income for those 80 or older

Only 60 percent of people who retire claim to have done any retirement planning at all

Delaying claiming Social Security “buys” people 6-8 percent more real benefits per year once they do take it

Olivia Mitchell, a professor at the Wharton School, University of Pennsylvania, explained this last point, noting that if a person stopped working at 62 but waited to claim benefits until 70, he or she would receive a benefit 76 percent higher in (real) dollars per month for life. “When to claim Social Security is many older Americans’ most important financial decision they will ever make in their lifetimes,” according to Mitchell.

Learn more about the event here and watch the video:

Video

• Helping America plan for retirement: Keynote remarks

Government spending on the elderly continues to climb.  Fueled by rapid growth in the number of Americans over age 65 and increased spending on benefits per person, public expenditures devoted to the elderly continue to edge up. A crucial question for future policy making is whether rising outlays on programs for the aged will squeeze out spending on programs for children, especially investments in their schooling. Many pessimists think this outcome is inevitable, and they urge us to reduce government commitments to the elderly to make room for spending on the young.

Federal spending is especially concentrated on the elderly. The Urban Institute publishes annual estimates of federal outlays on children and adults over 65. The estimates inevitably show a huge imbalance in spending on the two groups. In 2011, federal spending for the elderly amounted to almost $28,000 per person over 65.  In the same year, per capita spending on Americans under 19 amounted to just $4,900 per person. This means aged Americans received $5.72 in federal spending for every $1.00 received by a child 18 or younger.

The Urban Institute’s latest estimates show that federal spending on youngsters has trended down in recent years.  After reaching a peak of about $500 billion in 2010, expenditures on children fell 7 percent by 2012, and they have remained unchanged since then.

Future prospects are not encouraging. Urban Institute analysts predict that from 2014 to 2025, only 2 percent of federal spending growth will go to children. Almost 60 percent will be swallowed up by additional outlays on Social Security, Medicare, and Medicaid. Spending on many federal programs that provide benefits to children are financed out of discretionary programs. In contrast, big public programs for the aged seem to run on automatic pilot, with spending linked to changes in the cost of living and the size of the population past 65. Spending on most domestic discretionary programs is expected to be severely constrained as a result of Congressionally imposed budget caps. This is bad news for many federal programs targeted on children.

Focusing solely on federal government spending gives a misleading picture, however. While federal spending is heavily concentrated on the elderly, state and local spending tilts toward programs that help children, notably, through public school budgets.  Whereas aged Americans receive $5.72 in federal spending for each $1.00 received by someone under 19, those under 19 receive $10.11 in state and local spending for each $1.00 received by someone who is 65 or older. To be sure, total federal spending is considerably greater than that of state and local governments, but the imbalance of public spending on the young and the old is less extreme than federal budget statistics suggest.

Government spending on the aged is high because legislators (and voters) decided to establish government-backed pensions—through Social Security—in the 1930s and government-guaranteed health insurance for the elderly—through Medicare—in the 1960s.  In view of the overwhelming and enduring popularity of these two programs, most voters appear to think this was a sensible choice.  One implication of the policies is that Americans past 65 derive a sizable percentage of their retirement income, and an even bigger share of their health care, from public budgets.

The nation has not made an equivalent commitment to support the incomes or guarantee the health insurance of Americans under 65, except in special circumstances.  Those circumstances include temporary unemployment, a permanent work disability, and low household income.  Families headed by someone under 65 are expected to derive their support mainly from their jobs and from their own savings.  If non-aged families prosper, government spending on them falls.  If instead breadwinners become disabled or lose their jobs, government spending will increase as a result of higher disability payments, unemployment and food stamp benefits, and public assistance rolls.

Nearly all children are raised in families headed by someone under 65.  The government benefits they receive, except for free public schooling, increase in bad times and should decline when the unemployment rate falls.  The Urban Institute’s numbers are instructive.  Between 2007 and 2011, real federal spending on children increased 27 percent, or more than 6 percent a year, as the unemployment rate soared in the Great Recession. Federal spending on children then fell as unemployment—and outlays on government transfer payments—shrank.  For many categories of public spending on children, we cannot assume that lower spending signals a weaker commitment to children’s well-being. Instead it may signal a healthier private economy, a lower unemployment rate, and faster improvement in breadwinner incomes.

Of course, some components of government spending on children do not automatically rise in a slumping economy or shrink when breadwinners’ earnings improve.  Public investments in children’s preschool and K-12 education should be adjusted to reflect the needs of children for compensatory instruction and the expected payoff of added investment in schooling.  Statistics on public school budgets show that spending per pupil has increased considerably faster than inflation and faster than GDP per person over the past seven decades (see Chart 1). Whether spending has increased as fast as warranted is debatable, but rising government spending on the aged has not caused per-pupil spending on K-12 schools to shrink.

Government spending on children’s health has also increased over time as public insurance for children has been expanded.  In 2014 just 6 percent of Americans under age 19 lacked health insurance for the entire year.  The only age group with higher health insurance coverage was the population past 65, which is covered by Medicare (see Chart 2).  The main explanation for rising insurance coverage among children is that federal and state health insurance programs have been expanded to cover most low-income children.  Insurance coverage of children can and should be improved, but a sizeable expansion of public insurance has occurred despite the increase in public spending on the elderly.

The presumption that rising outlays on programs for Americans past 65 must come at the expense of spending on children rests on the unstated assumption that voters will zealously defend programs for the aged while tolerating cuts in programs that fund education, income protection, and health coverage for the young.  The trend toward higher public spending on the elderly has been underway for at least five decades, but the predicted cuts in spending on the young have yet to materialize.

Editor's Note: this op-ed first appeared in Real Clear Markets.

Social Security faces a financial shortfall. If Congress does nothing about it, current projections indicate that benefits will be cut automatically by 21 percent in 2034. Congress could close the gap by raising revenues, lowering benefits, or doing some of both. If benefits seem generous, Congress is likely to lean toward benefit cuts more than revenue increases. If they seem stingy, then the reverse.

Given the split between the two parties on whether to cut benefits or to raise them, evidence on the adequacy of benefits is central to this key policy debate. Those perceptions will help determine whether Social Security continues to provide basic retirement income for workers with comparatively low earnings histories and a foundation of retirement income for most others or it will become just a minimal safety-net backstop against extreme destitution?

Down-in-the-weeds disagreements among analysts often seem too arcane for anyone other than specialists. But sometimes they are too important to ignore. A current debate about the adequacy of Social Security benefits is an example.

The not-so-simple question is this: are Social Security benefits ‘generous’ or ‘stingy’? To answer this question, people long looked to the Office of the Social Security Actuary. For many years that office published estimates of something called the ‘replacement rate’—that is, how high are benefits paid to retirees and the disabled relative what they earned during their working years. A 2014 retiree with median earnings had average lifetime earnings of about $46,000. That worker qualified for a benefit at age 66 of about $19,000, a replacement rate of about 41%. Replacement rates vary with earnings. Dollar benefits rise with earnings, but they rise less than proportionately. As a result, replacement rates of low earners are higher than replacement rates of high earners.

As you might suppose, there are many ways in which to compute such ‘replacement rates. Because of analytical disputes on which method is best, the Social Security trustees in 2014 decided to stop including replacement rate estimates in their annual reports.

In December 2015, the Congressional Budget Office (CBO) offered what it considered a better measure of the generosity of Social Security. It estimated that replacement rates for middle income recipients were about 60%–dramatically higher than the 41% that the Social Security Trustees had estimated.

The gap between the estimates of CBO and those of Social Security is even larger than it seems. To see why, one needs to recognize that to sustain living standards retirees on average need only about 75% to 80% as much income as they did when working. Retirees need less income because they are spared some work-related expenses, such as transportation to and from work. Those are only average of course; some need more, some less.

If one believed the SSA actuaries, Social Security provides median earners barely more than half of what they need to be as well off as they were when working. Benefit cuts from that modest level would threaten the well-being for the majority of retirees who are entirely or mostly dependent on Social Security benefits—and especially for those with large medical expenses uncovered by Medicare.

On the other hand, if one accepted CBO’s estimates, Social Security provids more than three-quarters of the retirement income target. Against that baseline, benefit cuts would still sting, but they would pose less of a threat, and not much of a threat at all for most retirees who have some income from private pensions or personal savings.

When the CBO estimates came out, conservative commentators welcomed the findings and cited CBO’s well-established and well-earned reputation for objectivity. They correctly noted that many retirees have additional income from private pensions, 401ks, or other personal savings, and asserted that there was no general retirement income shortage. By inference, cutting benefits a bit to help close the long-term funding gap would be no big deal. Social Security advocates were put on the defensive, hard-pressed to challenge the estimates of the widely-respected Congressional Budget Office.

But earlier this year, CBO acknowledged that it had made mistakes in its Decameter estimates and revised them. The new CBO estimate put the replacement rate for middle-level earners at around 42%, almost the same as the estimate of the Social Security actuaries, not the much higher level that had sent ripples through the policy community. One conservative analyst, Andrew Biggs, who had trumpeted the initial CBO finding in The Wall Street Journal, promptly and honorably retracted his article.

Two aspects of this green-eyeshade kerfuffle stand out. The first is that policy debates often depend on obscure technical analyses that are, in turn, remarkably sensitive to ‘black-box’ methods to which few or no outsiders have ready access. The second is that CBO burnished its reputation for honesty by owning up to its own mistakes — in this case, a whopping overestimate of a key number. Such candor is all too rare; it merits notice and praise.

But there is a broader lesson as well. Technical issues of comparable complexity surround numerous current political disputes. Is Bernie Sanders’ single-payer plan affordable? Will Marco Rubio’s tax plan cause deficits to balloon? To vote rationally, people must struggle to see through the rhetorical chaff that surrounds candidates’ favorite claims. There is, alas, no substitute for paying close attention to the data, even if they are ‘down in the weeds.’

Editor's note: This piece originally appeared in Fortune.

Open any magazine aimed at the upper middle class and you’ll find lots of ads about retirement planning: financial firms fighting over which one will ‘advise’ you and get you to invest your money with them.

But, for most people, that isn’t the most important part of retirement planning. In fact, most people don’t have significant retirement savings, so arguing about who or how to invest them is irrelevant. Their “financial planning” is more likely to be about whether and when to pay the credit card bill.

So what kind of retirement planning really matters? There are lots of answers, but here are two of the most important: How long you work and when you apply for Social Security. For most people, these matter far more than whether your savings are invested in stocks or bonds.

Working Longer Requires More than Wishful Thinking. One of the great blessings of modern medicine is that people are living longer. But one of the consequences of that blessing is that unless people work longer and/or save more while they’re working, they’re more likely to run out of money in retirement than ever before. (The decline of traditional pensions, which paid lifetime income benefits, hasn’t helped either.) Most folks know this and are responding. According to a recent survey, 65 percent of baby boomers expect to work past 65.

But those expectations may not be met. Currently, about half of workers stop working before age 65: some are wealthy enough; more often they’re just not healthy enough.

Flexible retirement is more slogan than fact. Moreover, the job market isn’t as flexible as some may hope. Yes, an increasing percentage of seniors are working at least occasionally (~35 percent of men over 60, ~25 percent of women), but that doesn’t mean they’re doing their dream job on their chosen schedule. Increasingly, most of those who do work past 65 work full-time. Twenty years ago about 60 percent of workers over the age of 65 worked part-time; today about 60 percent work full-time.

It’s not clear why part-time work has declined, but one reason may be that employers still haven’t adjusted to the idea. A recent Transamerica Survey found that 66 percent of age 55+ US workers expect they will enter retirement flexibly -- but only 25 percent report that their employer offers the opportunity to move from full-time to part-time. However, the best way for employers to change is for their employees to ask (or have a union that does).

Retirement planning involves more than wishful thinking. If you want a flexible or a phased retirement, you need to know what your options really are – and the time to find out is long before you’re on the verge of retirement.

Defer Applying for Social Security? The other step that matters for most people is when they choose to apply for Social Security. Many apply as soon as they legally can do so, generally at age 62. For most people, that’s a mistake, because it means they will get reduced payments for the rest of their lives. Most others claim their Social Security benefits by the time they reach the “normal retirement age”, which for baby boomers is 66 years. (The normal retirement age is gradually being raised; for those born after 1959 it’s age 67.) For many people, that’s a mistake, too, because your lifetime benefit increases each year that you delay from 62 up to age 70.

How much more will your Social Security be if you start taking it at 70 instead of claiming benefits at the earliest possible age? A lot. For baby boomers, waiting till 70 increases the annual benefit by about 8% or each year of delay. That means instead of taking an annual payment at 62 of $10,000 a year, waiting 8 years means your annual payment will rise to $17,600 – inflation indexed for life. (If you keep working after age 62, then the math can be even more compelling, because Social Security is based on your highest 35 years of earnings.) If you are married, delaying also increases payments to your spouse after you die.

Of course, lots of folks have justifications for taking the lower payment at 62. Some say, “I won’t live long enough to make up the difference” – but in fact most people do live that long and many live longer. Others say, “I need the money to pay my bills.” But if you have savings or home equity, it’s worth using those first and taking Social Security later.

So the next time someone approaches you about moving your 401k money over to them, consider the option they won’t tell you about: spending it first and deferring Social Security. After all, Social Security gives you a guaranteed 8% return for waiting – and an 8% guaranteed return is hard to beat. (But they probably won’t tell you that, either.)

Editor's note: This piece originally appeared in Inside Sources.

Critics of the nation's retirement system regularly complain that the system is in crisis. Too many private companies fail to offer their employees a retirement plan. Many employees who are covered by a plan fail to make contributions to it. Those who do make contributions may contribute too little or invest their savings unwisely. The end result: Many of us will reach retirement age with miniscule pensions or too little savings to enjoy a comfortable old age.

The argument that our retirement system has gaping holes is well founded. The notion that it faces an imminent "crisis" is nonsense. If the system currently faces a crisis, it has faced the same one for the past 40 years. While elderly Americans have seen their incomes and living standards improve in recent decades, the median working-age family has experienced little improvement in its real income. Nonelderly families that depend solely on the earnings of breadwinners who have below-average schooling saw a drop in their incomes.

In recent research with Brookings colleagues, I tracked the real incomes of families headed by aged and nonaged Americans. In the 34 years ending in 2012, the median real income of working-age families climbed a little more than 2 percent (in other words, by less than one-tenth of a percentage point per year). The median real income of families headed by someone past 62 increased a little more than 40 percent. The numbers suggest our retirement system is doing a decent job improving the living standards of the aged. Unfortunately, the labor market is doing a much worse job boosting the living standards of middle-class wage earners.

Critics of the retirement system might worry that it succeeds in protecting the incomes of the middle class elderly but fails to protect the incomes of the poor -- a concern not supported by the evidence. Income inequality has gone up among the elderly as it has among the nonelderly. But older low-income Americans have fared much better than low-income working-age adults. In the late 1950s, by far the highest poverty rate of any age group was that for people over 65. Even in the late 1980s, the elderly had a higher poverty rate than adults between 18-64. Since the middle of the last decade, however, the elderly have had the lowest poverty rate of any age group.

People who warn us of a retirement "crisis" are nonetheless correct in pointing to sizeable holes in the current system. Too few companies, especially small ones, offer their workers a retirement plan. According to recent government estimates, only about half of workers in companies with fewer than 100 employees are offered a retirement plan. Offer rates are higher in bigger companies and in government agencies, but about 30 percent of all employees are not offered any pension or retirement savings plan where they work. When retirement plans are offered, however, workers are very likely to participate in them -- even if they must make a voluntary contribution out of their pretax wages.

What is crucial for a retirement savings plan's success is automatic payroll withholding. Dollars that are withheld from workers' paychecks are harder for workers to spend on something other than retirement savings. A crucial improvement in our current system would be to require all employers to establish automatic payroll withholding for voluntary retirement savings in an IRA (individual retirement account). Companies that already offer a qualified pension or retirement savings plan should be exempt from any extra obligation.

The harshest critics of the current retirement system would go much further than this. Many want to bring back traditional retirement plans that guaranteed workers a specific monthly pension linked to their job tenure, final pay, and age at retirement. The advantages of such a plan for workers are that their employer is typically responsible for funding the plan and for ensuring that pensions are paid, regardless of the ups and downs of financial markets. A big disadvantage is that the promised benefits are not worth much if the worker's career with a company is cut short, either because of a layoff or quitting.

People who are nostalgic for old-fashioned pensions may be right that workers would prefer to be covered by such a plan, despite their disadvantages for short-tenure workers. I'm less persuaded that traditional pensions offer better protection to typical workers than modern 401(k)-type plans. Regardless of the pros and cons of the two kinds of plan, it is wildly unrealistic to think small employers or new employers will want to take on the risks and administrative burdens connected with an old-fashioned pension plan.

All U.S. workers are covered by a traditional, defined-benefit pension: it's called Social Security. It has worked well over the past four decades in protecting and even lifting the incomes of the retired elderly. It may not work as well in the future if benefits are cut substantially to keep the program solvent. Boosting workplace retirement savings is a sensible way to insure future retirees will have adequate incomes, even if Social Security benefits have to be trimmed. An essential first step to boosting savings is to require companies to put a retirement savings plan in every workplace.

Editor's note: This piece originally appeared in Real Clear Markets.

The past few months have seen a flurry of reports on discouraging trends in life expectancy among some of the nation’s struggling populations. Different researchers have emphasized different groups and have tracked longevity trends over different time spans, but all have documented conspicuous differences between trends among more advantaged Americans compared with those in worse circumstances.

In a study published in April, Stanford economist Raj Chetty and his coauthors documented a striking rise in mortality rate differences between rich and poor. From 2001 to 2014, Americans who had incomes in the top 5 percent of the income distribution saw their life expectancy climb about 3 years. During the same 14-year span, people in the bottom 5 percent of the income distribution saw virtually no improvement at all.

Using different sources of information about family income and mortality, my colleagues and I found similar trends in mortality when Americans were ranked by their Social-Security-covered earnings in the middle of their careers. Over the three decades covered by our data, we found sizeable differences between the life expectancy gains enjoyed by high- and low-income Americans. For 50-year old women in the top one-tenth of the income distribution, we found that women born in 1940 could expect to live almost 6.5 years longer than women in the same position in the income distribution who were born in 1920. For 50-year old women in the bottom one-tenth of the income distribution, we found no improvement at all in life expectancy. Longevity trends among low-income men were more encouraging: Men at the bottom saw a small improvement in their life expectancy. Still, the life-expectancy gap between low-income and high-income men increased just as fast as it did between low- and high-income women.

One reason these studies should interest voters and policymakers is that they shed light on the fairness of programs that protect Americans’ living standards in old age. The new studies as well as some earlier ones show that mortality trends have tilted the returns that rich and poor contributors to Social Security can expect to obtain from their payroll tax contributions.

If life expectancy were the same for rich and poor contributors, the lifetime benefits workers could expect to receive from their contributions would depend solely on the formula that determines a worker’s monthly pensions. Social Security’s monthly benefit formula has always been heavily tilted in favor of low-wage contributors. They receive monthly checks that are a high percentage of the monthly wages they earn during their careers. In contrast, workers who earn well above-average wages collect monthly pensions that are a much lower percentage of their average career earnings.

The latest research findings suggest that growing mortality differences between rich and poor are partly or fully offsetting the redistributive tilt in Social Security’s benefit formula. Even though poorer workers still receive monthly pension checks that are a high percentage of their average career earnings, they can expect to receive benefits for a shorter period after they claim pensions compared with workers who earn higher wages. Because the gap between the life spans of rich and poor workers is increasing, affluent workers now enjoy a bigger advantage in the number of months they collect Social Security retirement benefits. This fact alone is enough to justify headlines about the growing life expectancy gap between rich and poor

There is another reason to pay attention to the longevity trends. The past 35 years have provided ample evidence the income gap between America’s rich and poor has widened. To be sure, some of the most widely cited income series overstate the extent of widening and understate the improvement in income received by middle- and low-income families. Nonetheless, the most reliable statistics show that families at the top have enjoyed faster income gains than the gains enjoyed by families in the middle and at the bottom. Income disparities have gone up fastest among working-age people who depend on wages to pay their families’ bills. Retirees have been better protected against the income and wealth losses that have hurt the living standards of less educated workers. The recent finding that life expectancy among low-income Americans has failed to improve is a compelling reason to believe the trend toward wider inequality is having profound impacts on the distribution of well-being in addition to its direct effect on family income.

Over the past century, we have become accustomed to seeing successive generations live longer than the generations that preceded them. This is not true every year, of course, nor is it always clear why the improvements in life expectancy have occurred. Still, it is reasonable to think that long-run improvements in average life spans have been linked to improvements in our income. With more money, we can afford more costly medical care, healthier diets, and better public health. Even Americans at the bottom of the income ladder have participated in these gains, as public health measures and broader access to health insurance permit them to benefit from improvements in knowledge. For the past three decades, however, improvements in average life spans at the bottom of the income distribution have been negligible. This finding suggests it is not just income that has grown starkly more unequal.

Editor's note: This piece originally appeared in Real Clear Markets.