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.

You also get a deduction in America for taking a night school course, growing sugarcane, moving to a new city for a job, replanting a forest, insulating the attic, destroying old farm equipment, employing Native Americans, commuting to work by bicycle - but only if the bike is regularly used for a substantial portion of travel - or buying a plug-in hybrid sports car, or buying a recreational vehicle. I mean there are hundreds of them, and most of them are nuts.

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 was an easy thing to tax for a young country. And then gradually we moved to property taxes, manufacturing taxes, and the income tax was the answer to a populist demand: Let's go after the rich guys. We got into World War I, and they raised the rates and started taxing the rich. Then we got into World War II, and that's when they taxed everybody, because they just needed more revenue.

Professor Eric Zolt of UCLA, said to me, "The VAT is such a good idea, mark my words, within five years, the U.S. will have a VAT." Then he said, "Of course, I've been saying that for 20 years."

Americans spend about 6 billion hours a year collecting the data and filling out the forms. We spend $10 billion to H&R Block and other preparers. And on top of that, $2 billion in tax preparation software, which still takes hours of work. It's outrageous the burden we put on people, and guess what, you go to Europe, you go to Japan, it's 15 minutes and costs nothing.

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