There is a major social and cultural message in the current economic collapse for the future retirees of America: Forget retirement.

That's right. The recession is making clear what we've suspected for a long time. The concept of not working and embracing leisure for the last third of one's life isn't practical for most people.

Put it this way: Survey after survey has shown that a majority of aging baby boomers plan on working in retirement. Well, that plan is coming true.

How insecurity led to a security net

Economic downturns often accelerate change. For instance, in the latter part of the 19th century, the country moved from a rural, farm economy to an urban, industrial one. The wealthy associated old age with leisure, but for everyone else it usually meant involuntary unemployment and a humiliating dependence upon family, charity, or community organizations for shelter and food. Policy reformers agitated for some kind of a financial safety net for the nation's impoverished and isolated elderly.

Not much happened until the Great Depression. It was an economic disaster for families, especially the elderly "as they watched their hard-won assets vanish, and with them their hopes for an independent and secure old age," write historians Carole Haber and Brian Gratton in Old Age and the Search for Security. (Sound familiar?) Traditional middle-class objections to a national safety net crumbled with the Depression. Social Security became law in 1935.

"The real or incipient collapse of individual households helps to explain the widespread popularity of Social Security," say Haber and Gratton.

Our image of retirement is still shaped by the early decades after World War II. The elderly poverty rate plunged thanks to Social Security. Older Americans gained universal health-care coverage with Medicare in 1965. And Corporate America offered workers defined-benefit pension plans based on a salary and years-of-service formula.

It was in these years that retirees developed a distinct lifestyle captured by the mass migration to Sunbelt communities, traveling in RVs and bus tours, spending long mornings on the golf course, and other recreational pursuits. The development of modern retirement is a great social achievement of the 20th century.

But in the 21st century, the underlying economics of retirement are changing.

Living longer, working longer

On the positive side, we're living longer. Average life expectancy is now about 78 years, up from 61 years when Social Security became law. We're healthier, too. Disabilities among the elderly are declining, thanks to a combination of healthier lifestyles and medical advances.

A seismic shift in the economy and workplace is making it easier for an aging population to labor longer. An information- and services-dominated economy will ease the transition to longer working lives. Simply put, toiling away on a computer in medical diagnostics or government bureaucracy is far less demanding than manning an auto assembly line or mining for gold. The rise of an economy based on intangibles and longer life expectancy is behind more than a decade's worth of scholarly research, aging conferences, and popular press articles trying to redefine retirement.

Retirement savings wiped out by crisis

The day of retirement reckoning is here for less happy reasons, too. For the second time in eight years, savers have watched in horror as their 401(k)s, 403(b)s, and other retirement savings were hit with sharp declines. This time around, the household wealth destruction is even greater because of the nationwide fall in home prices. For instance, from the last quarter of 2006 through the third quarter of 2008, the real value of homes and household holdings of stocks plummeted by $5.6 trillion, according to a recent report by Hoisington Investment Management Co. in Austin, Tex. It predicts that the wealth loss may exceed $10 trillion when the fourth-quarter figures are calculated.

Indeed, the current pension system is making everyday retirement insecurity worse. Employers have embraced defined-contribution savings plans like 401(k)s. But 401(k)s don't deliver a steady stream of income during one's golden years. There's also plenty of evidence that workers with access to defined-contribution savings plans aren't taking full advantage of them, either.

But wait, there's more: The health insurance system is widely acknowledged to be broken and is a strain on family finances. Even with Medicare coverage after age 65, the elderly are finding it necessary to pay for a greater percentage of their overall medical bill.

The comedian George Burns used to get a laugh saying, "Don't stay in bed, unless you can make money in bed." It's no longer a joke. Many aging workers simply can't save enough to create a solid foundation of savings that will maintain their standard of living in retirement.

Postponing retirement

The solution: work longer. After all, earning a paycheck in your latter years can make a huge difference in retirement living standards. Pocketing even a slim income often allows retirement portfolios to compound over a longer period of time.

Take this calculation by economist Robert Shackleton of the Congressional Budget Office, which posits a married couple is in their early 60s earning $100,000 pretax a year. They'll need nearly $66,000 a year after taxes to replace 80% of their preretirement income. (The 80% is a standard rule of thumb when it comes to making this kind of retirement calculation.) If both retire at age 62, they'll receive more than $25,000 in total Social Security benefits and require a portfolio of at least $891,000 to generate the income they need to live the good life through their normal life expectancy. (The calculation comes from a paper written several years ago, so the Social Security numbers will have changed a bit over the years. Yet the basic calculation remains true.)

But if our couple waits until age 66 to retire, their Social Security benefits go up and the time they need to bank money shrinks, so $552,000 in savings will suffice. Retire at age 70? All they require is a portfolio worth some $263,000. And so on.

More than making ends meet, work is physically and mentally energizing. It keeps the mind active and dementia at bay. For many people, the workplace is a social environment, with birthday celebrations and coffee klatches. To be sure, you may want to say goodbye to your current office mates for the last time. But that doesn't mean you won't want to work.

Of course, not all senior citizens will be physically and financially healthy in retirement. Especially vulnerable are less educated workers. So are single-parent households. Both groups are far less likely to have a pension plan and own their home. And then there's the lingering problem of ageism: Some employers are still hostile to aging workers with sagging middles and graying hair.

Nevertheless, the recession has made it clear that retirement and work will be woven into a new cloth for many Americans. The challenge for all of us - employees and employers - will be making the best of the situation.