As someone that thinks of myself as a low-caste, middle class American it's interesting seeing all of these people listed in the article making less than me
A lot of people consider themselves middle class and are wrong in that self assessment. It goes both ways, you have people making a half a million a year and people making twenty thousand who both consider themselves middle class.
I went to a state school, worked at Amazon and didn’t get a 2300 on my SAT - I definitively am lower caste but the caste/class divergence isn’t well understood in culture I think.