If they don’t have to work to live, they’re no longer working class (Musk still works at Tesla, but clearly doesn’t need to). But I’m not sure what your point is. Are you saying that those who derive their wealth from the labor of workers but who can’t afford a yacht should be treated differently than billionaires? I’m not arguing that we shouldn’t have progressive tax rates, I’m only saying that an arbitrarily defined ‘middle class’ exists solely so that you and I are distracted by exactly these discussions, and provides no benefit to determining what is justifiable economic policy.

Those at the midpoint still have to work to live, so they are working class. 🤷

Imo the entire concept of the middle class should be abandoned as capitalist propaganda. There’s the rich and there’s the working class. Anything else is a distraction to keep us from focusing on the rich stealing from the workers. Bezos owns a $500,000,000 yacht while thousands of his employees rely on government assistance programs which are funded by taxes he doesn’t even pay.