Probably better to measure by where people are on the income distribution than above/below arbitrary points like 100k. Most of the research I've seen uses quin

Probably better to measure by where people are on the income distribution than above/below arbitrary points like 100k. Most of the research I've seen uses quintiles as a proxy for "class". If you look downthread, I've linked some that disagrees with you re: USA vs other anglosphere countries.