Actually, he and his wife have funded some pretty important research and organizations fighting all kinds of issues that strike hardest in developing nations. His reward? Being cast as a RW Lex Luthor by gaslighters and the misinformed.
Nah. Firstly, the Friendliest Oligarch does not need your protection from the mean Internet critics.
He literally has the resources and connections to put every homeless person in the US in a permanent home. His funding of people building toilets that don’t rely on large-scale water infrastructure is cool, but a few billion could be spent actually building that infrastructure in many of those nations. Most of them don’t actually havepsycho leaders who would stop him.
No. People with so much wealth that they’d still be considered extremely rich if they gave away 95% of their fortune don’t get a pass because they spend a few percent per year on good PR efforts.
However, one could argue that those conditions are created by crime lords like Falcone. Several comics have expanded on the history of Gotham, but all depict it as a city that has always had crime. Some even imply the infuence of the occult in regards to the darkness that hangs over Gotham.
Plus, it's not like psychos such as Riddler or Scarecrow would suddenly give up their life of crime if there was no more poverty. Gotham is a city with many problems, and poverty is just one of them. Whether it is Gothem's main problem, is open to debate. Batman doesn't seem to think so.
In the Nolan verse, the Wayne family has actually tried to improve the living conditions of Gothams citizens, but the city got swallowed by crime none the less. In part due to the work of Raz al Gul and his League of Shadows.
I think Gotham's problems are so deeply rooted, that simply waving some dollar bills at the problems will not make them go away. I don't think real life thinking applies here, since Gotham is a fictional city obeying by fictional rules. Even if you solved all poverty in Gotham, there would still be crime and corruption, which then creates new poverty.
I mean, this is why people don’t connect much with Batman anymore, but it’s also a larger issue with comics. The world needs to make some sort of sense in the parts that aren’t magic or x-genes or whatever, for readers to reliably give a damn.
By placing a guy with essentially limitless money in a city that is shown on panels to have a major homelessness problem, and saying, “poverty isn’t Gotham’s problem”, you create a disconnect that just doesn’t work.
Like, even if Gotham is under some magical influence, Batman isn’t spending his time finding that out, while using his billions to improve living conditions in the slums (the city has slums, therefor poverty is at least A major issue in Gotham

).
Also, if it’s crime lords causing the crime (which is completely absurd), then why isn’t Batman focusing his nighttime drop bear impersonations on...the crime lords?
There is no possible model of crime in which putting individual muggers and burglars in the hospital meaningfully reduces crime. It’s just revenge for a trauma, directed at the entire lower class. The poors killed his mom, so he is gonna run around at night in a costume punching as many as he can find, and gather a cult of personality around him that he has convinced of his meaningless “crusade”.