system
Given the following post, respond as if you're commenting on Reddit:
human
[Batman/ Jack West Jr] Could Batman put Joker in a trophy tank?

For those who haven't read The Five Greatest Warriors by Matthew Reilly (I highly recommend it), it features tanks of formaldehyde which keep people alive (they are provided oxygen and an IV drip too, but only enough to keep them alive and in a weakened state), essentially turning them into living trophies. This doesn't hurt the person, or kill them, but simply keep them living for as long as it takes for the IV stuff to run out. 
My question is this; would this work for Batman and Joker? For example, if Batman made one of these, and put Joker in it, and kept him in some secret safe in the Batcave. Then Batman gets what he wants and Joker has to live out his sentence, and then Joker can't hurt anyone from the confines of his tank, keeping everyone generally safe. It's also a better option than Arkham, since the place is essentially a revolving door, with people coming and going all the time.
So.... would it work? Why/ why not?
gpt
Based on our studies of the vigilante known as the "Batman," our conclusion is that this would not be a viable option.  Batman's pathology shows definite signs of intense obsession around his concept of "Justice," and as such he continues to leverage the criminal justice and mental health system after apprehending suspects.  "Batman" feels that while his actions are beyond the reach of the law, he does not have an ultimate authority to pass judgement over the criminals he apprehends - if he did, we suspect we would've seen no end to dead or permanently maimed suspects years ago.