This is a great deal.
El Salvador is providing a public service.
It is totally reasonable that they be compensated for it.
Notice they are offering to do this for illegal aliens from any country, not just El Salvador.
is it a one time fee, or lifetime for the entire wretched life of Jose?
Yep. This guy gets it. No tariffs for you!
The criminal element might not view American jail as necessarily all that bad a prospect, worth the risk when they're committing whatever crimes they're compelled to.
Now, facing what could be a life sentence in El Salvador's megaprison...
Maybe they'll think twice about it.