My point is not that he shouldn't give charitably, but there is something that seems deeply pessimistic to me about turning to the rich to solve our societal ills. If the implication is that we should have a more 'fair' tax system, I can get on board with some version of that straw man, but would rather we as a society fix our own problems rather than hoping for help from the plutocrats.
Why should we assume that Bezos or any other billionaire would solve these problems in a way that is actually in society's best interest? Would we wish that Bezos spend his money differently than the Koch brothers?
We have government to help create solutions for this space, and in my opinion we should reject the passive acceptance of mediocrity there and instead hold them accountable for delivering these things. I may not be holding my breath for this, but that is part of the problem.