The best proof yet that nobody has actually read Piketty’s book:

In other words, very few economists believe that Thomas Piketty’s equation r > g explains the rise in US inequality over the past 40 years. The punchline here, however, is that Piketty’s book does not say that r > g explains the rise in US inequality over the past 40 years.

The best criticisms of Piketty have not come from the media or right wing hacks. They’ve come from policy wonks in the center.