Why Doesn't Batman Kill?

[Mutant God]

Batman just catches the criminals. It isn't his job to kill them. The real question should be why does the state that Gotham City is in have no death penalty? Is there anyone left that thinks the Joker can be rehabilitated?

My guess is that either Gotham's Government or the Court of Owls (or maybe both) have guys like Joker to keep around so that all the police force and vigilantes have their attention on them meanwhile the white collar criminals and government agencies can do what their want .

Leading to these maimed criminals committing suicide or abandoning their kids resulting in even more orphans for Bruce Wayne to adopt and Batman to train as fodder.

Which leads to Bruce Wayne's School for Gifted Orphans and Psychopaths lol.