When you think of policies that are going to address inequality of wealth, you have to be very thoughtful about what economists call "incidence of taxes." If most of the savings is being done by capitalists, and you tax the return on capital, then they will have less to invest. That would mean, over the long run, that the rate of interest would go up. That would therefore undo some of the intent to lower the income of capitalists.

Put yourself in the shoes of one of these oligarchs who has been given a gift of $10 billion. Russia is in a deep depression. Nobody's investing. There is a widespread political consensus that the way you got your wealth is illegitimate.

Moreover, because we chose to finance the way by borrowing, our deficits and debt has soared, and this means we have less room for maneuver, less money available to stimulate the eocnomy in the way needed.

It is unlikely that others would even demand their money back overnight, for doing so would lead to the value of the dollar plummeting; what they would get back with be worth little. But what we are already seeing is an erosion of confidence of the dollar, which is seeing the dollar fall in value.

The momentum today behind the idea of a new global reserve currency reflects, in effect, the rise of the rest in world politics and economics, led by China.

I grew up in a family in which political issues were often discussed, and debated intensely.

For the United States, our political system is clearly distorted. We have gerrymandering so that there is a situation where a million more voters who vote for Democrats, yet the House is controlled by the Republicans. So clearly, the way our Congress operates is important. The other big issue is the influence of money in politics. It's not only campaign contributions. People like Trump - either you become very dependent on your benefactors or you are very rich.