Which pretty much no one paid because there were so many exceptions to it. Starting with the fact that the top long-term capital gains tax rate was 25%, not 90%.
A lot of those exceptions got eliminated as part of the process of reducing the top marginal rate to the levels we observe now. The current "top" Federal rate is 39.35% on earned income, 40.8% on interest, non-qualified dividends, and short-term capital gains, and 23.8% on qualified dividends and long-term capital gains. That assumes a large enough income that we're not worrying about Social Security in any way, or phaseouts of various sorts or whatnot, but _are_ hitting the extra medicare tax and net investment tax provisions of the ACA. It also assumes that the employer side of the 1.45% Medicare tax is not incident on the employee, which of course it is, but we're comparing "headline" rates.
So specifically for Jeff Bezos, most of whose "income" is presumably long-term capital gains due to AMZN price appreciation, the difference between the "decades ago" utopia you describe and now is the difference between a 25% and 23.8% marginal rate on that long-term capital gain income.
All that said, are you paying a 28% _marginal_ rate, or a 28% _effective_ rate? And are you specifically talking about "wealthy" people or "high-income" people? I ask because last I checked the top 1% of incomes paid something on the order of 25% _average_ Federal tax rate for the last several years (i.e. after the tax cuts a few years ago), and the top 0.1% of incomes paid closer to 27-28%. That's just counting income and payroll taxes, not the incidence of corporate income taxes or whatnot. And again, just Federal; state taxes are a separate story.