George Will has written an excellent column on the minimum wage:

A federal minimum wage is an idea whose time came in 1938, when public confidence in markets was at a nadir and the federal government's confidence in itself was at an apogee. This, in spite of the fact that with 19 percent unemployment and the economy contracting by 6.2 percent in 1938, the New Deal's frenetic attempts had failed to end, and perhaps had prolonged, the Depression.

Today, raising the federal minimum wage is a bad idea whose time has come, for two reasons, the first of which is that some Democrats have an evidently incurable disease -- New Deal Nostalgia. Witness Nancy Pelosi's "100 hours" agenda, a genuflection to FDR's 100 Days. Perhaps this nostalgia resonates with the 5 percent of Americans who remember the 1930s.

The problem is that demand for almost everything is elastic: When the price of something goes up, demand for it goes down. Obviously were the minimum wage to jump to, say, $15 an hour, that would cause significant unemployment among persons just reaching for the bottom rung of the ladder of upward mobility. But suppose those scholars are correct who say that when the minimum wage is low and is increased slowly -- proposed legislation would take it to $7.25 in three steps -- the negative impact on employment is negligible. Still, because there are large differences among states' costs of living and the nature of their economies, Sen. Jim DeMint (R-S.C.) sensibly suggests that each state be allowed to set a lower minimum.

But the minimum wage should be the same everywhere: $0. Labor is a commodity; governments make messes when they decree commodities' prices. Washington, which has its hands full delivering the mail and defending the shores, should let the market do well what Washington does poorly. But that is a good idea whose time will never come again.