Monetary expansion underlies and significantly influences if not drives, everything you mentioned (save the nature of US mortgages, which is still related in the sense of it being a part of financialization of as much of American life as possible). The QE boom drove immigration, and low interest rates drove hiring and wage inflation; the COVID bust dampening immigration, and the extremely low interest rates driving a hiring frenzy that was itself followed by mass layoffs when the FRF was raised, essentially proved this.

>Underutilized RE is a red herring.

So you've stated. Please prove it, at the very least showing how RE isn't underutilized (this is going to be difficult, because it is).