Why hasn't the US government just passed a bill that lowers the age of consent to 10 years old for anyone with a net worth over $100 million?

Would be redundant

Laws already don't apply to anyone with a net worth that high, and ethics didn't even play a role in getting there.

They need to play the "good cop, bad cop" routine. If the working class understood that every single member of the bourgeoisie is completely reprehensible, then they might develop class consciousness. But if enough of them pretend to have a soul then they can get the working class to fight amongst ourselves instead.

That still leaves a problem of getting consent.

They get away with it because of the people who either believe the lies or choose to along with the lies. I don't think this would continue to work for long if they were actually honest about it.