Regarding your last sentence about the jealousy, I have been thinking about this quite a bit for myself, if it is actually jealousy. And I have come to the following realisation:

I would like 20$ million. It would let me live the life I want (with extra), and take care of the people I love. I would be able to spend my time doing only things I like. I am envious of people having this kind of wealth. I don't really want more, and I am not more envious of someone having 100 of millions of dollars. This you must just belive me on, but I truly don't see what I would do with more than 20$ million.

But they, the ones with hundreds of millions, are the ones I want to tax. Because I am afraid of them, afraid of the power that comes with the wealth. And if it was envy I would have wanted to tax everyone I envied, also the ones with 10-20$ million. But I am fine with them having their wealth, cause they don't scare me.