Would it be wrong of me to say that these should be used for any Gitmo detainees that happen to expire?
Yes, because a very large number of Gitmo detainees are released without any charges. Some of our allies are (gasp) not great folks and often sell us some random guy to get paid.
Basically, it wouldn't be wrong, as long as you wouldn't mind if I bashed you over the head, sold you to DurkaDurkaStan, said you were an evil filthy terrorist or enemy combatant or telemarketer, collected a nice bounty while you tried telling the DurkaDurkaStani soldiers (in English, which they don't speak) that you're certainly not a telemarketer, and you got buried in ... I dunno, a Hi Point themed casket.
Detained != guilty of squat.