I just saw Mark Elias' tariff theory. It is a far darker idea than tariffs as sales tax to replace income tax.
His idea is that it is just a Grand Corruption Machine. It is designed such that leaders from business, US states and other countries have to go to Trump and beg for relief from the tariffs that apply to them. The begging involves making Trump richer.
The idea that trillions of dollars are being wiped from the stock exchanges, a severe recession seems imminent, inflation is spiking and the entire world order is being upset so that Trump can play at being king of the world and get some kickbacks does seem like a very Trumpian plan.