You operate under the assumption that the economy and taxes are a zero sum game. That billionaire won't eat more or really consume that much more if he makes another million... he'll invest it. That creates wealth that can then be pursued by the labors of the person making nothing.OTOH, if someone makes billions and billions, well, we can probably tax them (say) 20%, and it won't be a killer for them.
It's a reasonable, natural, and fair thing to do, and it is not tantamount to "stealing."
I don't think I said stealing but it is not "fair" and equal treatment. It is not honest, blind justice for all. It is wrong in every respect that charging you more for a gallon of gas than your neighbor who happens to make a little less than you would be.
You keep skipping my major objection though. The income tax in every form gives gov't too much power over people.