BS jobs were a consequence of peak productivity+cultural insistence on working 8 hours a day 5 days a week. They will go away, doesn't matter if it's AI or demographic collapse that kills them first.
Class warfare assumes you have lots of demand and lots of potential productivity and the bottleneck is the capital. It's a consequence of eternal population growth assumption that's simply not true anymore. If you ignore that all your conclusions will be false. Demography matters.
Our future will be labor- and demand-constrained, not capital-constrained. It will have more in common with the world after Black Death, than with the industrial revolution.
Marxism is as relevant today as Malthusian trap = not at all.
> As the power classes globalize
Why would they? We're deglobalizing pretty quickly for the last few years and it's going to accelerate.