The racist origins of the Davis-Bacon Act

From an interview and biography of George Mason University economics professor Walter Williams:

Mr. Williams distinguished himself in the mid-1970s through his research on the effects of the Davis-Bacon Act of 1931—which got the government involved in setting wage levels—and on the impact of minimum-wage law on youth and minority unemployment. He concluded that minimum wages caused high rates of teenage unemployment, particularly among minority teenagers. His research also showed that Davis-Bacon, which requires high prevailing (read: union) wages on federally financed or assisted construction projects, was the product of lawmakers with explicitly racist motivations.

One of Congress's goals at the time was to stop black laborers from displacing whites by working for less money. Missouri Rep. John Cochran said that he had "received numerous complaints in recent months about Southern contractors employing low-paid colored mechanics." And Alabama Rep. Clayton Allgood fretted about contractors with "cheap colored labor . . . of the sort that is in competition with white labor throughout the country."

Today just 17% of construction workers are unionized, but Democratic politicians, in deference to the AFL-CIO, have kept Davis-Bacon in place to protect them. Because most black construction workers aren't union members, however, the law has the effect of freezing them out of jobs. It also serves to significantly increase the costs of government projects, since there are fewer contractors to bid on them than there would be without Davis-Bacon.

Wikipedia has more on the Davis-Bacon Act here.