I really like the idea of consumption tax, and most countries have a pretty serious consumption tax. It's called a value-added tax or a goods and services tax ... It's a sales tax. It doesn't tax labor, it doesn't tax savings or investment - it taxes consumption.

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.

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.

We cut tax exemptions in 1986, it was the most admired tax reform in U.S. history. Congress and the president worked together then to eliminate scores of loopholes and exemptions and deductions; this made taxes much simpler, and allowed a major cut in tax rates.

Corporations use all sorts of complex stratagems to move their profits overseas, and thus escape the U.S. income tax.

The Value-Added Tax, a sales tax that applies at every level of business transactions, is an easy tax for governments to collect, and a hard tax to evade.

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.