True, but it seems that Piketty's position is that those ideas succeeded and would have continued to succeed if left in place - and consequently, that if we imp

True, but it seems that Piketty's position is that those ideas succeeded and would have continued to succeed if left in place - and consequently, that if we implement them now we will also have success. If it turns out that Piketty's history is incorrect, then the past failure of such plans should make us cautious about trying them again.