So the Bush-Obama administration has taken a fiscal stance diametrically opposed to that of the patron saint of free enterprise. While escalating war in Afghanistan and maintaining over 850 military bases around the world, the administration has run up the national debt that Smith decried. By shifting the tax burden off property and off rent-seeking monopolies - above all, off the financial sector - this policy has raised America's cost of living and doing business, thereby undercutting its competitive power and running up larger and larger foreign debt.

Trump has said that he wants to remove the tax deductibility of interest. If he can do that, fine. But I hope that Trump knows that it's not the President that sets tax policy. It's Congress.

That's why Apple, Microsoft and the big information technology companies have kept so much money registered abroad (although in US dollar accounts with a nominal foreign address's owner). They pretend to make their global income in Ireland. They have an office, which could be simply a postal drop box in Ireland, and claim to make all their money there, not in America.

Deflation means a slowdown of income growth. Markets shrink, new capital investment and employment also taper off, so wages decline. That is what's happening as deliberate policy in Europe and the United States. Falling or stagnant prices are simply the result of having less income to spend.

I think something like three-quarters of American currency is held abroad, by drug dealers, by tax evaders, Russians and Chinese. Other people think that they want to protect themselves against their own currency going down. When you have 75% of the currency and even more of the high-denomination $100 bills held abroad, you wonder whether these are people we really want to pay. If you get rid of the $100 bills, its foreign holders will be the main losers.

The banks' product is debt. They try to tell customers that "debts are good for you," but the customers can't afford any more debt, so there's no way the banks can continue their current business plan.

The United States and Europe are in a state of debt deflation, where people and businesses have to pay banks instead of spending their income on goods and services. So markets shrink, sales and profits fall, and the stock market turns down.