There's a tradeoff. Yeah, I lose the deduction that I really like, but my tax rate is going to go down, and I don't have to fill out that form anymore. It's much simpler, rates are lower, and that tradeoff has worked in many countries. Many countries have just cleaned house of all those exemptions in order to provide lower rates, and people buy it.

The higher the rate, the more interest there is in avoiding the tax. Either you move or you shift your profits overseas, as American corporations have proven very good at doing.

President Trump repeatedly says that "America is the highest-taxed country in the world." This is an alternative fact. We pay less in taxes, and our government spends less, as a share of our total wealth, than our counterparts in Western Europe and East Asia. But Trump is right when it comes to corporate tax rates; the U.S. corporate income tax right is among the highest in the world.

Mortgage is one of the most popular deductions. It costs the Treasury about $103 billion a year. Now that's money we could use to treat wounded veterans or reduce the deficit or fill the border. Instead, we give it a subsidy to homeowners, and it goes mainly to the richest homeowners in America, because only one third of Americans itemize their deductions. It doesn't work. Many countries have gotten rid of the mortgage interest deduction. Almost all of them have higher homeownership rates than we do.

If your employer pays your health insurance, that's not counted as income to you. And any economist would say that's your income, because they'd pay a higher wage if they didn't take it. That's a huge loss to the Treasury.

Starting in the '80s or so, after the United States sharply cut its rates, other countries decided they better do it too, and here's how you do it: you just wipe out the exemptions, the deductions, the credits, the depreciation allowances. And people complain, "Oh my God, it's terrible," but you give them much lower rates and you give them an easier form to file, and people accept that tradeoff.

It turns out a VAT - a value-added tax - is a very easy tax to collect and a very hard tax to evade. It's a really good idea. It was invented about 60 years ago in France, of course. Because they're so good at taxing. They had a business tax that was easy to evade, and the head of the French IRS invented this value-added tax, which is very hard to evade.