There is a common assumption among the Marxists/Socialists/Communists/Social Democrats/Technostists/Basic Income Advocates etc, that the elites need the consumption of the plebs in order to be rich. This is wrong.
What does getting rich mean? Getting rich means being be able to afford the labor and ingenuity of other people. Example: you are rich to the extend that you can afford the labor of your waiter and chef at a restaurant. A richer person will be able to afford the labor of a better waiter and a better chef.
With better automation, being rich means being be able to afford better automation.
With better automation, The rich people today will simply start affording automated labor, and they will start consuming the products of such labor directly. They wouldn’t increasingly need plebeian consumption much like they don’t increasingly need plebeian labor.
The rich would certainly fear our rebellion if we were large in number, but thanks to panopticons, contraceptives, abortion and low marriage rates, that problem will fix itself.