I'm pretty much always open to dumping things back down a level but SS is a pretty straightforward concept and isn't likely to benefit much from the 50 heads versus 1 approach in the same way education or infrastructure will, and a great many people move to a different state over the course of a working lifetime, you could transfer funds between states I suppose, still, I am open to the notion of it, but I'd rather it remained federal or better yet privatized.

Medicaid already is state-managed, Medicare might benefit from being state managed too, that's another one where I'd want to hear the pros and cons in more depth.