-Neither party cares about the debt
I think individuals might care about debt but parties don't.
But to everyone NOT shackled to partisan bickery....debt is an abstraction. It gets twisted and taken out of context, assigned to presidents and/or congresses depending on where you blame to lie, etc.
It's just an abstraction to most people. the numbers are so insanely big....it can't be comprehended.
And since it takes issues like abortion, guns, gays, etc...to get people to pay attention politically.....the debt is simply ignored.
-Actually, the SS taxes are super-regressive, since the withholding has a cap.
And the benefits follow that cap.