Mostly because our ability to organize and unify against the wealthy is overwhelmed by the wealthy’s tools to keep us factioned and distrustful of each other. Hence the necessity of the fascist enemy within rhetoric.

The problem is, we humans are simple emotional beings who are really credulous when it comes to being told stuff we want to hear, and the wealthy have crafted messaging catering to this bias and wishful thinking (hence “you are the chosen people and have to massacre all the others who are spiritual flesh-eating zombies”)

That sounds way cooler to the lumpen-proletariat than “you’re just another commoner, but if we work together we can topple the people who hoard all the stuff and make a fun themepark for everyone!”