What kinds of inequality are acceptable?

David Brooks offers some thought-provoking tongue-in-cheek insights in a recent New York Times essay:

Fitness inequality is acceptable. It is perfectly fine to wear tight workout sweats to show the world that pilates have given you buns of steel. These sorts of displays are welcomed as evidence of your commendable self-discipline and reproductive merit.

Moral fitness inequality is unacceptable. It is out of bounds to boast of your superior chastity, integrity, honor or honesty. Instead, one must respect the fact that we are all morally equal, though our behavior and ethical tastes may differ. . . .

Technological inequality is acceptable. If you are the sort of person who understands the latest hardware and software advances, who knows the latest apps, it is acceptable to lord your superior connoisseurship over the aged relics who do not understand these things.

Cultural inequality is unacceptable. If you are the sort of person who attends opera or enjoys Ibsen plays, it is not acceptable to believe that you have a more refined sensibility than people who like Lady Gaga, Ke$ha or graffiti. . . .

Lots more where these came from.