Why do people still listen to Paul Krugman?

Jerry Shenk reports:

Keynesian theories were debunked in the 1920s when austerity reversed the Depression of 1920, in the 1930s when Keynesian-inspired spending policies deepened and prolonged the Great Depression, in the 1940s when Keynesian alarm over deep post-war budget cuts proved overblown, in the 1990s when Keynesians opposed spending drawdowns after the Iron Curtain fell, and again in 2009 when a massive Keynesian stimulus did nothing for the American economy beyond increasing deficits and the national debt by more than $1 trillion.

An article well worth your time.