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Don't like Greenspan's assessment of Social Security? Well, don't kill the messenger for getting it right.

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Greenspan Was Correct When Speaking About Social Security

Don’t like Greenspan’s assessment of Social Security? Well, don’t kill the messenger for getting it right.

When Alan Greenspan recently revealed unpleasant truths about Social Security, he was widely misinterpreted as having merely recommended cuts in retirement benefits, as though this was simply his personal preference. What Greenspan was really doing was warning younger workers that, in the absence of serious reform, they will end up paying much more for Social Security and getting much less.

Social Security trustees estimate that the population age 65 or older will more than double by 2035, reaching 75 million, while the population under 65 will grow by only 15 % . That is why Social Security and Medicare threaten, as Greenspan said, to “place enormous demands on our nation’s resources — demands we almost surely will be unable to meet.” Raising future tax rates would just encourage even more seniors (and youngsters, too) to drop out of the labor force and thus stop paying Social Security, Medicare and income taxes.

Greenspan noted that projected federal outlays for Social Security and Medicare are projected to increase from less than 7 percent of GDP today to 12 % by 2030. Just the increase alone — 5% of GDP — is nearly two-thirds as much as the IRS normally collects from the individual income tax (about 8% of GDP).

Beltway pundits reacted with denial and deception. Washington Post columnist E. J. Dionne wrote that Democrats should be “grateful to Greenspan” for “speaking the unspeakable: Sustaining the tax cuts that President Bush has pushed through will require cuts in Social Security.” Dionne’s comment was a rhetorical shell game; he quickly slipped the pea beneath a different shell, hoping you wouldn’t notice.

Social Security is supposed to be financed from the Social Security tax. President Bush did not cut the Social Security tax. So how can lower income tax rates today be blamed for lower Social Security benefits in the future? This makes no sense unless those grateful Democrats plan on bailing out Social Security with much higher tax rates on individual income. If that is their secret plan, they should say so. But it won’t work. It would require debilitating tax increases 5 % of GDP. For Dionne and others to pretend such huge sums could be raised by merely repealing a few “high income” tax cuts is irresponsible nonsense.

In a recent Brookings Institution volume, Henry Aaron, Bill Gale and Peter Orszag echo Democratic presidential hopefuls by proposing to reverse 2001 income tax changes “that benefit high-income filers.” But “high-income” turns out to mean “the top four marginal tax rates” — all earnings above $29,050.

Yet even with this monastic definition of affluence, their static revenue estimate from raising all four tax rates is a trivial 0.4 % of GDP in 2014. Errors in estimating the current year’s budget deficit are often larger than that. The estimated loot from raising the dividend tax to 39.6% and the capital gains tax to 20 % is just 0.2% of GDP. Such revenue estimates rely on rosy scenarios (if the tax on dividends went back up, investors would just revert to not holding dividend-paying stocks in taxable accounts), yet the alleged amount of revenue is nonetheless insignificant.

“The crucial issue,” Greenspan emphasized, is “the rate of growth of the economy. … And while I fully recognize that it’s an easy solution to a problem when you have a deficit to increase taxes, it’s not evident to me that over the long run that actually works.”

Such astute remarks infuriated another Washington Post columnist, Steven Pearlstein, who claimed Greenspan was “effectively embracing the lunatic idea that cutting taxes will generate more government revenue, not less, by stimulating economic growth. This theory, of course, was disproved both during the 1980s, when taxes were cut and the deficit swelled, and the 1990s, when taxes were raised and deficits turned to surpluses.”

It is prudent to be suspicious when anyone writes about factual matters without bothering to show you a single fact. Pearlstein asks his readers to infer what happened to tax revenues by generalizing about what happened to deficits and surpluses.

That is a lunatic idea. Defense sending fell from 6.3 % of GDP in 1986 to 3.1% by 1998 — accounting for the entire drop in total outlays and most of the swing from deficit to surplus. And revenues from the capital gains tax soared after 1997 when the capital gains tax was cut from 28% to 20% . Higher tax rates in 1991 and 1993 had the opposite effect.

Total receipts from the individual income tax averaged 8.2% of GDP from 1988 to 1990, when the top tax rate was 28% , then dropped to 7.8 percent in 1991-92 after the Bush tax increase. We would normally have expected a cyclical upturn in revenues by 1993-94, regardless of the 35 percent and 39.6 percent tax brackets added that year and the increased taxation of Social Security benefits. Yet revenues from the individual income tax were only 7.7 percent of GDP in 1993, 7.8 percent in 1994 and 8.1 percent in 1995 — still lower than in 1989 (8.3 percent) before the two “tax increases.” The economic recovery was also unusually feeble, with a 3.3 percent growth rate in 1992 and 3.1 percent from 1993 to 1995. Revenues did surge in 1997-2000, but a large portion of that revenue gain was from capital gains taxed at 20 percent.

Taxes on individual income fluctuate cyclically but have long been a nearly constant share of GDP (e.g., the CBO estimates individual income taxes at 8 percent of GDP from 2005-2009). Taxes on corporate income vary with profits, and taxes on payrolls vary with employment. It follows that the only way to achieve a sustained increase in real federal revenue “over the long run” is by adopting policies conducive to sustained increases in real economic growth. That was Greenspan’s key point.

The rapid aging of America means “we almost surely will be unable to meet” the future promises of Social Security and Medicare. Higher tax rates are not the solution but the problem itself. Meanwhile, don’t blame Messenger Greenspan for this message. He got it right.

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Mr. Reynolds is a senior fellow with the Cato Institute.

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