Buffet made his billions by paying as little tax as possible, now he wants to close the door behind himself. If he's paying 17% or so that tells me that most of his money is in the form of capital gains and dividends, and that he has the best legal and tax minds working to see that that's all he pays. He's also a huge supporter of the death tax and 0bamacare because he's heavily invested in life insurance and gap insurance. The rich use life insurance to pay off the death tax and keep their estates intact. No death tax no real need for life insurance on a large scale.
So the when MSM tries to make Buffet to be this generous individual, interested in fairness, just remember, he didn't become the worlds # 1 investor by worrying about "fairness".
Andrew Carnegie was the same. He earned his money during a time when there was no income taxes. But, after he made his bundle, he testified before Congress in support of the Income Tax. Typical Liberal.
At least Carnegie donated a lot of his money to charity (Carnegie libraries, etc.). Maybe at least Buffett could donate his estate to the US Treasury...