Well, as social mobility between classes becomes increasingly difficult, they become more and more like castes...

You can already hear the pseudo-theories, justifying the differences for eternity. Blue blooded, of lazy blood, etc. Apply yourselfs and you will win.. adding insult to injury, when you can not win, you must in addition be lazy with only yourself to blame.

OP is right. Status games take many shapes, distinct castes is one special shape.

Being in Congress is very mobile, and they're the ones with the special exemption.