Right, but even if all of his money was made with investments his tax rate was still only 13.9% which is 1.1% below 15%. He is paying less than the investment tax rate which shouldn't be possible.
We shouldn't worry about the people who pay little or no taxes because they have nothing to give. If they paid taxes they wouldn't be able to survive. Simple. We tax the rich because they can afford to pay it. The top 10% is actually UNDERREPRESENTED in the taxes. They pay 75% of the taxes but control 80-85% of the wealth of the country. There is no significant amount of money that can be collected from the poor people. It would be a drop in the bucket. The cost of supporting the people who couldn't afford to live if they paid significant federal income tax would be greater than the amount of money collected. Taxing the poor would cause the country to LOSE money.