"We used to have super high taxes for the wealthy and corporations."
Did we?
Because what I see is a high marginal tax rate really only in the postwar years. ... And anyone who begins their economic model in the late 40s is a moron or a liar.
Remember anything important that happened, say, midcentury?
Something that may have left the US fabulously wealthy, particularly relative to all the other industrialized countries who were shattered & left in ruins by the same event?
Anyone who points to that time and stupidly says "durr, we should do it THAT way" conveniently disregards the (hopefully unique) economic environment resulting from multiple, cataclysmic, economy shattering wars and the luxuries available to those left standing thereafter.