The crisis was 2008, in 2015 - almost eight years later and the gap between where we would have been and where we are is huge and not closing. The implied unemployment rate is very high, labour force participation is very low, and the increase in wages in the second quarter was the lowest in 25 years. Before this turmoil, the U.S. economy was in better shape than Europe or Canada, but not strong.

I trace the inequality to a particular set of decisions that we took when we lowered the tax rate from 91% down to very low levels at the top, where we stripped away regulations. So the result of that was not a more dynamic economy, but a more unequal society. We tried the experiment of trickle-down. A third of a century later, we can say fairly definitively that it was a failure.

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.

I knew that discrimination existed, even though there were many individuals who were not prejudiced.

Most poor people earn more than minimum wage when they are working; their problem is not low wages. The problem comes when they are not working.

The extra curricular activity in which I was most engaged - debating - helped shape my interests in public policy.

When I said "the pocket of the banks," it is not necessarily a mercenary relationship. It is a mindset.