Inflation is too much money chasing too few goods.
Too much money - in the name of "Covid Relief" trillions of new dollars have been dumped into the US economy.
Too few goods - Covid shutdowns, paying people not too work (again, in the name of "Covid Relief"), and punitive regulations have hobbled production and stuck it to producers.
MV = PQ. Make M go up a lot, and at least in the short run, P must also go up a lot. Especially when you incent people to not product, by, for example,
****ing sending them the M in checks so they don't have to generate the Q.And when people anticipate dP/P > 0, as even an idiot does, then dV/V > 0, which, given that Q is more or less fixed in the short run, creates a self-enforcing prophecy. Yes, it's pretty high level, but that's more or less the size of it. Actual economics is easier to understand than DUmbonomics, because there is actual logic and empirical content rather than references to friggin' Prescott Bush and all that.