What's to explore? He found out one of the dirty realities of the American Oligarchy. But somebody has to pay taxes, and Bezos should have his head displayed on a pike as a message to other oligarchs.
I read it as he does not mind paying his fair share of taxes. Then he finds out that the rich are not paying so his share is not fair. I think he is mad at the rich and the system they have established for themselves to the benefit of the rich. I don't think he wants to pay less himself but for the rich to pay more - their fair share.