It would be illegal for companies to do this, and governments certainly can tell private companies not to discriminate against certain classes when hiring. Google, meanwhile, is not breaking the law by choosing what content is hosted on their platform and under what circumstances.

You're presenting a false dichotomy here because Google is not a state, it is a private company, and because content creators are not a government whose laws Google must follow, but rather are themselves bound by Google's terms of service, which grant Google absolute, irrevocable and arbitrary power over their accounts, content, visibility and monetization.