Let me sketch out that argument really briefly for you here. Absent any kind of government intervention, markets make investors richer than workers (AKA "the rate of return on capital exceeds the rate of return from growth" or "r > g"). This is true even for extremely powerful workers who get very, very rich indeed. Piketty illustrates this in many ways, but my favorite is the Parable of Bill Gates, Liliane Bettencourt and Bill Gates (again).
2/