Is anyone familiar with the Melinda Cooper argument that there was a concerted shift in the US / Canada from capitalist distribution of surplus via wages to assets? Obviously in the long run this alone would cause a great stagnation of economic growth, which is what we've been seeing for decades now as real production stalls and asset inflation skyrockets.
I haven't had a chance to read her book(s) yet, but prima facie it seems a compelling argument.