There have always been two theories about inequality. One is that it reflects just deserts. The other is that there are large elements of exploitation and inequality of opportunities. The evidence is overwhelmingly that the increase in inequality is associated with those negative factors. If it were all social contribution, then when the top did better, they would be contributing to everybody's well-being. That trickle-down hasn't happened. We've seen median income, people in the middle, actually worse off than they were 25 years ago.