I'm not a fan, because I'm not in favour of State-run services, but they make what seems to me to be a sound point; that where ICE is private, but State funded, processing people takes the longest possible time because the longer the process takes, the more money they earn. This would also be why conditions are brutal and so inhumane; it's cheaper.
Charlie Munger I think wrote something like if you give people stupid incentives, you get stupid outcomes.
On the face of it, this looks like that, with the added complication the lunatics now running place would say this treatment is desirable.
Question then is how do you set up a State-funded privately run system to behave in the ways you do want, with rapid processing and humane treatment of people.