Whatever you think of inequality, the data is showing that it can't be positively changed by increasing taxes

http://marketmonetarist.com/2014/06/03/a-clean-break-with-hollande-a-lesson-for-piketty/

I love this paragraph

What strikes me is that neither Mitterrand nor Hollande had any idea about how economic incentives work. And frankly speaking when I read Piketty’s book then my main take away was exactly the same – Piketty doesn’t seem to understand incentives. It is social planing or engineering rather than economics.