>Buffett always complains that he did not pay enough tax. He could simply wire 50% of his fortune to the IRS. His secretary had no choice. (End of sarcasm)

Wealth is competitive. Over time, having a higher rate of return than someone else results in substantial differences in overall wealth. Everyone in his position being on the same playing field and chipping in equally is not the same as him martyring himself and letting more selfish peers acquire more resources and sway.