THE STIMULUS ANNIVERSARY Five years ago today, President Barack Obama signed the American Recovery and Reinvestment Act into law. The $830 billion spending blowout was sold by the White House as a way to keep unemployment from rising above 8%. But the stimulus would fail on its own terms. 2009 marked the first of four straight years when unemployment averaged more than 8%. And of course the unemployment rate would have been even worse in those years and still today if so many people had not quit the labor force, driving labor-participation rates to 1970s levels.

The...