system
Given the following post, respond as if you're commenting on Reddit:
human
[Batman]Why are all these random ultra-crazy criminals being held in the same place?

Shouldn’t the state or federal government have intervened in this situation to have some of them moved to other facilities?

How is the situation at Arkham allowed to continue?
gpt
It's an unfortunate overlap between a few different things.

First, most of their crimes happen in Gotham, which means they're under the jurisdiction of the city. Unless they cross certain lines, the Feds don't have ground to step in; consider the Animated Series episode where Joker freaks out because he's wound up on the radar of the IRS. 

Second, the laws in Gotham's home state regarding the legal definition of "insanity" are broader than most of the U.S.. In Gotham, being declared nuts by qualified professionals is enough to kick you out of the normal penal system, versus a more standard definition where you need to be crazy enough to not understand that you're committing crimes.

Third, once you've got these kooks on the hook, you can't just stick them anywhere. For all it's reputation for permeability, Arkham Asylum is *the* center for excellence nationwide for keeping these psychos contained in anything resembling humane conditions. They've got the gear, the staff, and the will to keep these people contained for as long as possible, and only fail because they're a mental hospital squaring off with supercharged freaks, Einstein-grade geniuses, criminal masterminds, and criminal cartels, both from inside and outside. If you tried keeping these monsters in any normal mental hospital, or even any normal jail, they'd tear through them like tissue. The only places that can hold them better are absolute hellholes like Belle Reve, which even then have an imperfect record.