Warren Buffett caused quite a stir last week. In a New York Times commentary, he told Washington to stop "coddling" the superrich. He said that last year he paid only 17.4 percent on his taxable income, while employees in his office paid from 33 percent to 41 percent.
Buffett is a spectacular judge of value in the market, but his suggestion that the tax system is no longer progressive is a head-scratcher. His impressions clash with numbers published by the Congressional Budget Office (as Michigan economics Prof. Mark Perry noted on his Carpe Diem blog).
Last year, the CBO looked at federal tax rates for 2007. It found that average rates -- for all federal taxes, including Social Security -- ranged from 4 percent for the lowest income group to 25.1 percent for the highest. Our tax system is solidly progressive.
Where Buffett was most off-base was his assertion that tax rates have little influence on decisions to undertake risk -- the impulse on which almost all economic growth depends.
"I have worked with investors for 60 years," Buffett wrote, "and I have yet to see anyone -- not even when capital gains rates were 39.9 percent in 1976-77 -- shy away from a sensible investment because of the tax rate on the potential gain."
The slippery word here is "sensible." Buffett tries to ignore the reality that a person's definition of "sensible" is liable to change if Uncle Sam reaches for more of the potential payoff.
Buffett is a Democrat, and Democrats often strain to believe that taxes don't change behavior.
Never mind that none of them have any trouble understanding that a tiny increase in interest rates by the Federal Reserve will percolate through the economy and create real, material consequences. Interest rates aren't taxes, but the point is the same.