The difference is that the mega-billionaire might fund social projects and special industrial initiatives to provide less incentives to perform criminal acts and rather labour for both their own and society's benefits? Good argument that Batman might better fight more crime, and in a much more socially cohesive way, if instead of spending billions on crime fighting technology he spent the money building better schools and better workplaces for the poor.
Of course, that and Batman's refusal to kill people who are obviously going to murder again, and again, and again ... and the fact that Gotham, despite being such a screwed up place, doesn't have a decent jail. Maybe Batman should build a better jail.
... and I just realize that I hard necro'd this forum topic <.<