I doubt they could even if they wanted to. All problems cannot be solved by throwing money at them, and the local governments may not be cooperative or efficient enough to use the money. There are chemically engineered drugs that will gigafry your brain into addiction in one dose getting better every day. Police departments all over the country/west seem to be ineffective at enforcing order, courts are too delayed and too lenient on sentencing, list goes on. Problems on the public side that private enterprise can't really fix without a lot of cooperation. Maybe in a much less regulated world like the Carnegie's, they would be able to try a lot of things without permission, now it would take years of begging to get a permit to build a drug rehab centre somewhere no matter how rich you are and the neighbors would block it.