Somebody spent money on those tanks. By stealing the equipment, he's embezzling money from Wayne Enterprises. Think of all of those grandparents who own stock in Wayne Enterprises. They're stock holders, they have rights.
Depends on which continuity you're talking about. Yeah, he's clearly embezzling money from Wayne Enterprises in the Nolanverse, because in that continuity, Wayne Enterprises is a public corporation. In the comics, however, it's a single proprietorship, owned by Bruce Wayne and operated by Lucius Fox. It's not theft if he already owns the company.
Certainly all those programs you mention would reduce the criminal element, but, it's not going to do anything about your Penguins, Jokers, Catwomans, etc, they're criminals because it's who they are, not because they didn't get enough to eat or enough education as a child.
Who they are? So, it's not the environment they grow up in? They were ALWAYS going to be criminals?
There will always be criminals, yes, because there will always be some people who are not desperate, and are not genetically deficient, but who are just amoral SOBs. It's inevitable -- there are just too many people in existence for a few not to just be evil assholes.
However, the majority of Batman's rogues gallery are in fact certifiably mentally ill.
If there were more mental health services available, young Copperpot might not have grown up to have such issues.
Oswald Cobblepot (the Penguin) was actually born into a wealthy family, IIRC. And he's one of the few who aren't mentally ill. He's just a right bastard, that one.
And the Joker... well... if there were greater EPA standards, or if say, some rich Billionaire was an advocate for the environment...
Who's to say that Wayne didn't advocate for the environment, and isn't dedicating numerous resources to charities and social reform organizations? What makes you think he's not taking a two-pronged approach?
And bear in mind that Gotham, especially early in the days of Batman, is so fundamentally corrupt that even if one billionaire is advocating for stronger EPA regulations, that doesn't mean that other companies won't be fucking around.
And when was the last time he went after a white collar criminal?
Does going after Lex Luthor, CEO of LexCorp and President of the United States, count?