Or that just means that upper class doesn't start at the boundary of the top quantile.
I'm sorry but no stretch of the imagination has upper class as a couple making 33k/yr each. That's absolutely absurd. That's $16.50 an hour with no overtime.
Looking at it, upper class typically is the top one or two percent of the population.
The OP specifically mentioned "upper classes". It is a fact that the lower classes (lowest quantile) are underrepresented, and the higher classes (highest quantile) are overrepresented [0].
I'm sorry but no stretch of the imagination has upper class as a couple making 33k/yr each. That's absolutely absurd. That's $16.50 an hour with no overtime.
Looking at it, upper class typically is the top one or two percent of the population.
https://en.wikipedia.org/wiki/American_upper_class