Imagine being worth 185 billion dollars and still obsessing about your workers advocating for better pay and conditions? What a miserable existence that must be. Bezos has always struck me as a man who cares about nothing else only his own personal wealth and success. There is no joy in his life.
On the contrary, he is probably very happy with the way things are. You may be buying into the "Just World fallacy"; there are plenty of people you may find despicable who are leading happy, fulfilling lives, by their standards.
I think the antipathy towards workers a combination of 2 things: it takes a fair amount of conceit/self-belief to dare think you can change the world (statistically speaking). The second thing is, even if you didn't start of with that mindset, success usually brings a certain post-hoc justification in the vein of "Clearly, I have been successful, therefore I'm better than most", which easily morphs into "My needs are more important; the little people are too focused on short-term goals and yet I have to compete with them for the same resources to achieve even more important goals I have planned". As someone from a low-income background, I have noticed that the more successful I have been, the less empathy I have, and I'm only middle-class. I don't know if it's because of my increasing income, increasing age, or combination of both.