> inter-generational wealth mobility in the US is quite low, much lower than in most of Europe

I was surprised by this so I looked up a few sources. Not saying it's not true but we must be looking at different sources, here's a chart on "intergenerational earnings elasticity and with only a couple European countries (Italy and UK) slightly above the US:

https://en.wikipedia.org/wiki/Social_mobility#/media/File:Th...