Economists often define their discipline as "the allocation of scarce resources among competing ends." But when resources or money really become scarce, economists call it a crisis and say that it's a question for politicians, not their own department.

The other dynamic keeping the stock market up - both for technology stocks and others - is that companies are using a lot of their income for stock buybacks and to pay out higher dividends, not make new investment,. So to the extent that companies use financial engineering rather than industrial engineering to increase the price of their stock you're going to have a bubble. But it's not considered a bubble, because the government is behind it, and it hasn't burst yet.

If you're a wealthy heir with a trust fund, and you sell stocks, make your 10% gains since Donald Trump, and then you buy other stocks, you can avoid paying taxes. And if your accountant registers your wealth offshore in a Panamanian fund, like Russian kleptocrats do - and as more and more Americans do - you don't have to pay any tax at all, because it's not American income, it's foreign income in an enclave without an income tax.

I think we're in the take-the-money-and-run stage of the economy. So the banks may go under, but the bankers, who make the policy, clean up.

The bank's product is debt, because the banks want to make sure that they can get paid for the debt. But ultimately the only party that can pay the debt is the government, because it runs the printing presses. So the debts ultimately either are paid by the government, or they're paid by a huge transfer of property from debtors to creditors - or, the debts are written off.

The aim of promoting low down payments is to push prices back up so that fewer houses are going to be in negative equity and fewer people are going to walk away from the mortgages. That will save the from taking a loss on their junk mortgage loans.

The vast majority of $100 bills are abroad, not in the United States. So yes, of course there's a use here but nowhere near as much as there's a use for $100 bills abroad.