> The idea NYC shouldn't do its best to take care of its own because people in Alabama aren't getting enough is nonsensical. Imo they already get far more than they deserve.

Absent a federal wealth redistribution, yes NYC must do its best for it's residents. I'm not disagreeing with that. A federal wealth tax, however, would tax Alabama billionaires as much as it would tax NYC billionaires.

Good point. It is a good thing as you point out to remember that even so called "poor states" also suffer from pretty severe wealth inequality, in some cases perhaps more stark than one would find in the blue cities, if only because the floor can appear far wider and lower.