We already see that the US needed to pay El Salvador to accept its prisoners, and the UK pay Rwanda to take asylum seekers. It's hard to think of a country which will accept people the US considers to be freeloaders, except by taking considerable compensation .. or by threat of military force, which is also expensive.
My friend, this is America. We already have so much experience relocating displaced undesirable native peoples into marginal lands where they can cosplay independence and autonomy. Oklahoma is pretty much taken, but I think we can spare Arkansas, Kentucky, and a few others.
I know a lot of people from high school for whom this would be a big step up in life actually.
So, send them to Coventry, set up a ghetto or Bantustan, or be glad there are a lot of islands as in Brave New World.
I misread your "else" in "you get a one way ticket somewhere else" as outside of the US, not partitioning the US.
Historically this means the US will still be spending a lot of money on these so-called freeloaders, not only for internal border control (people, smuggling) but also pollution emissions, water flow, and all the other boring crap usually handled by national law and interstate compacts.
We already see that the US needed to pay El Salvador to accept its prisoners, and the UK pay Rwanda to take asylum seekers. It's hard to think of a country which will accept people the US considers to be freeloaders, except by taking considerable compensation .. or by threat of military force, which is also expensive.
If you want a dystopian future, just kill them.