Batman repeatedly made attempts at systemic change using his wealth. It’s kind of his arc - he starts young out of anger and rage with his only limit being he would not kill. As he ages, his various funds and programs he starts run into roadblocks from criminals seeking to exploit vulnerabilities in then to enrich themselves. But his biggest problem (in Gotham at least) is that there are many villains who simply want to fight progress because it makes them feel good. His money can do a lot of the work, but his particular skills allow him to apprehend some of the biggest challenges to his goals.

But he’s still human. He’s still deeply flawed. That’s sort of the whole point. He’s not fixing everything alone, he can’t. None of us can.