That may be about right if you mean "the top 25% of people in terms of income subject to income tax" and "of the taxes" you mean "of income taxes", which aren't even the only tax on labor income (or even the most significant tax on labor income for a large proportion of the workforce.)

OTOH, the top 25% of income-subject-to-income-tax earners aren't even approximately what most people mean when they say "the rich", and the issues raised with the fairness of the tax system aren't limited to income tax, but to the structure of the tax system and what taxes things are subject to at all.

But to answer your question, I think income after $1m/yr should be taxed at close to 90% and that capital gains should also be considered part of that income. We can start there.