It is a nice object lesson in how a couple of obscure changes in the tax law can save a few people a lot of money. The IRS has reported that the number of those earning $200,000 or more who paid no taxes rose sharply in 2005. More than 7,300 of these worthies avoided U.S. income tax entirely, two-and-a-half times the year before. About 85,000 paid worldwide taxes of less than 10% of their income.    more »