When is enough..... enough. It is reprehensible that Amazon is allowed to make that much money pay little to no taxes and Bezos can treat his employees like second class citizens from a third world country. I guess the only thing Amazon doesn't sell is a MORAL COMPASS.
Hoarding what? He had shares of Amazon and other companies. Those companies gain value, so does he. He doesn't have 200 billion in cash lying around.
Alternatively, maybe do what you want with the money you earn, and let other people do what they want with theirs.