Business Week's Michael Mandel talks up the Ponzi scheme angle, then proposes his solution:
But there is one enormous difference between Social Security and a Ponzi scheme: Technological change. Over the past century, new technologies have enabled the output of the country to grow much faster than its population. To be more precise, the U.S. population has more than tripled since the early 1900s, while the U.S. economic output has gone up by more than 20 times.
This long track record of technology-powered growth has enabled the enormous rise in living standards in the U.S. and other developed countries. In fact, this increase in productivity—output per worker—is the key fact which gives us our way of life today.
Assuming that technological progress continues over the next 70 years, and output productivity growth continues over the next 70 years, the finances of Social Security are relatively easy to fix. A fairly minor cut in benefits, combined with a relatively small increase in taxes, will bring the system back into balance again. (the latest Social Security report projects a 75-year deficit of $4.3 trillion. That sounds like a lot of money, but over 75 years it's roughly $60 billion a year…not chicken feed, but not overwhelming).
But here's the rub. Ultimately our ability to make good on the "Ponzi-like" nature of Social Security depends on the continued march of technological progress—and in particular, innovation which boosts output and living standards. If we leave the younger generation a good legacy—a sound scientific and technological base, combined with an innovative and flexible economy and an educated workforce—then Social Security is not a Ponzi scheme. The economy grows, and there's more than enough resources for everyone.
But if instead we—the current generation—invest in homes, flat-screen televisions and SUVs, then we don't leave the next generation with the technological "seed corn" they need. If the technological progress slows, then Social Security does turn out to be Ponzi-like—with unfortunate consequences for everyone.
I'm all for technological progress – though unlike Mandel I personally think flat-screen televisions are a pretty mean technological feat – yet Mandel seems to have a bit of a technology fetish, such that it's the cure for everything.
In this case, technological progress – which affects Social Security by increasing productivity, thereby increasing wages – doesn't have that much to offer. The reason is that retirement benefits in the future are based on wages today; if technology raises worker's wages today, it also increases the amount Social Security promises to pay them in the future. On a person-for-person basis, it's roughly a wash.
Technology/productivity/wage growth can help because benefits paid to current retirees aren't indexed to wage; they rise year-to-year only with inflation. So if wages rise, the cost of paying current benefits falls relative to the wage base. Roughly speaking, the system's actuarial deficit – currently around 1.7% of payroll over 75-years – improves on a one-for-one basis with rising wage growth. The baseline rate of wage growth is 1.1%, so this implies that if wages grew at 2.8% then the program would be solvent for 75-years (though not beyond).
The spreadsheet I posted here lets you play around with different economic/demographic assumptions. The key takeaway for me is that we shouldn't bank too much on productivity growth to bail us out of the Social Security problem.
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