On one hand richest top 1% own 30% of the total US wealth (and services/goods for the rich is a booming sector) but on other hand their wealth depends on a fully functioning economy. If 99% of population will be excluded form the economy top 1% will not be able to keep their current wealth either (even if they still be comparatively better off).
I don't see how the rich don't understand this. Guess they just think it won't happen to them and they'll be smart enough to cash out of America and go elsewhere before everyone else looses.
I worry that some fraction of those 1%ers have the hope that this is where AI will lead to in the end: You don't need the 99% if they can actually be replaced with robots.
Or, if that doesn't work (because the robots are too dumb), you can at least split off the economy into a "poor" and a "rich" part that are mostly disconnected from each other.