The motto of Republican and New Democratic tax plans since at least Reagan has been, "from the needy to the greedy." That this Lafferable philosophy would cause any economy to crater has been obvious to virtually all sentient beings (those who benefit from such nonsense, of course, pretend to believe the propaganda that this will help an economy).
All one really needs to know about "Supply Side" economics should have been learned in the 1980's.
All one really needs to know about "Supply Side" economics should have been learned in the 1980's.