Yes, really

Ok that socialism part was probably from me consuming a bit too much conservative media, so here's a picture originating in NYT to counterbalance it.

That's the thing though, afik the federal laws trump state laws, so if a state decides that they are no longer going to pay their former employee the pension that they had mutually agreed upon say some 20 years ago, I don't think that just changing the state law to say it's cool would fly. But I really don't know all that much.