It's not a binary decision. Those with the means can still chose to donate some of their money to causes they like, and we as a society can (or should) still chose the way in which we want to allocate public funds towards more health spending or away from defense spending.
Choosing to donate to a cause that affects him personally is no different than when people create charities or foundations or donate money to fund research for diseases that affect their immediate family members - which happens quite often.
I agree, more or less, because certainly there's a long history of people creating charities to fill in the gaps left by government. It's the way he's doing it, on Google+ and as the CEO of Google that I don't like. Maybe it's just because of the mixing of personal and work life or something. I don't know why, it just gives me a creepy feeling like I wouldn't want to get involved with the guy. Maybe I'm just jealous because I don't have my own fuck you money.
Choosing to donate to a cause that affects him personally is no different than when people create charities or foundations or donate money to fund research for diseases that affect their immediate family members - which happens quite often.