Piketty would claim that wealth accumulation has reached a maxima. Return on investment is, after all, wealth being concentrated into fewer and fewer richer and

Piketty would claim that wealth accumulation has reached a maxima. Return on investment is, after all, wealth being concentrated into fewer and fewer richer and richer individuals. If wealth can't be concentrated further then return on investment can't happen either. We might have reached such a state in which the rich, relatively speaking, can't get richer and the masses of poor, relatively speaking, can't get poorer. You can't squeeze water out of a stone.