Since 2008 "not understanding inflation" was his (as well as Yellen's and Bernanke's) job description... They were printing money like there's no tomorrow, but "tomorrow" is now.
I personally think that the FED is doing the best they can right now. Did they keep interest rate low for too long? Yes. But who could have envisioned a pandemic and then the supply/demand shock after it.
It’s not just QE. Couple excessive government spending, with intentional disruptions of the energy supply, and the ongoing damage from the COVID lockdowns and inflation was inevitable. Powell’s comments are concerning since it was obvious as the nose on his face.
I'm not convinced. I skimmed the article and the key piece of evidence seems to be a linked bloomberg chart that shows corporate profit margins spiking up recently. However, if you go to the source data[1] and zoom in, you see a different picture. Specifically, profit margins were increasing the most between Q2 2020 and Q2 2021, but have since stayed mostly flat. However, that's not in line with CPI[2], which only really took off in february 2021.