I think there's clearly a question of envy which doesn't seem addressed.

I'm not particularly in favour of high taxation, but I think that the argument is a bit more subtle than that. The general point is that "the ultra rich" are able to benefit from a whole host of loopholes which allow them to pay proportionally less than the plebs.

Now, this specific point seems somewhat debatable, judging by the fact that people don't seem to agree; I personally have not looked into the matter to form an opinion.

Maybe our tax code hasn't kept up with the financialization of the economy. In any case, this whole tax increase thing, at least as I see it in France, since to spill over to "regular rich people", as in engineers or similar who "just" have a relatively high salary.

Another issue, which I think is different but is rolled into complaints about rising tax rates is what the state actually does with the money. As in "I'm ok with paying tax, but not to fund this or that thing". In France, specifically, many "public service" offices have closed, having people either travel great distances or fight half-assed computer systems, while, at the same time, the number of public servants (so, cost) has increased.