I still think it's useful to separate out the working middle/upper class from the true "aristocracy" (for lack of a better word). A professional in the middle c

I still think it's useful to separate out the working middle/upper class from the true "aristocracy" (for lack of a better word). A professional in the middle class can save up and buy property until they can live off passive income to become upper class but that's a different class from the people who can fund their life styles through financial arbitrage by the sheer size of their wealth.