[rayiner]

Pretending that income, one of the most important things in American society, is merely one of the “millions of ways” to classify people, and that a persistent large disparity between racial groups in that metric is mere “correlation” is intellectually dishonest.

[EventH-]

That is literally the definition of the word correlation. Claiming 'intellectual dishonesty' is a nice rhetorical move but doesnt actually show anything. The point remains.

A second point above which needs addressing is that it simply does not follow logically that differences in outcome must be a result of 'social inefficiencies and failures.' Culture and biology are some other obvious causative factors, but there are others. There is no reason to adhere to a reductionist view in which everything is caused by social pressures.