Earlier quoted context omitted.
"taxes in the US are far more progressive than they used to be." How do you figure? Between 1936 and 1989, the tax rate for the top income bracket varied between 63% and 91%. https://qz.com/74271/income-tax-rates-since-1913/
because tax rate on income is meaningless when they don't have income and when tax rates were high their incomes vanished. that is the true history and true facts
A progressive tax rate is one that increases as the taxable amount increases.
So, I could be missing something, but I don't see how your post addresses my response. Saying it's meaningless doesn't change the definition of a progressive tax rate.