Of course because that’s how marginal tax rates work.
As to how much actual money was taxed at 91%, we don’t really have records for that but certainly the top 0.01% paid significantly more in taxes as a rate than they do today.
"That reality" was one in which the wealthy had countless deductions, loopholes, and shelters that were unavailable or inapplicable to everyone else, which (almost) everybody agreed was an undesirable state of affairs.
As to how much actual money was taxed at 91%, we don’t really have records for that but certainly the top 0.01% paid significantly more in taxes as a rate than they do today.