I wonder if all these very public proclamations are going to shift people's attitude towards taxes? Most people think of the government as wasteful, inefficient, incompetent, and corrupt to more or less degrees, and I know I'd prefer to see money allocated by smart people like Gates, Buffet, Zuckerberg than by politicians who need to keep constituents happy and win votes.
I committed a while back to giving 10% of my income to charity henceforth, probably for my whole life. I know I've felt much better when I raised money for St. Jude's or Grand Ormond Street children's hospitals than when I wrote a check to the IRS to fund the latest special interest-fueled debacle.
There's a "the evil rich are against us" narrative in movies and stories a lot, but I wonder if the perception will start to change when all the good from these endeavors is realized. I think it's quite likely that smart people allocating resources intelligently will do 10x, 20x, 50x more good with the money than a politician possibly could.