The top 400 earners are the top ten thousandth of a percent. They are the outliers like Romney. And if 1/3 of them are paying less than 15% that means 2/3 of them are paying more than 15%. Which is a higher effective rate than the vast majority of the middle class pays. To be paying less than 15% they are necessarily getting the bulk of their income from capital gains (money that is taxed at least twice), and they have deductions (usually in the form of charitable giving). We should rejoice in this. High earners get to keep more of their own money!!! Maybe they will buy some of the expensive vintage toys I sell in my shop.