Which follow when you send in the money. Not because throwing more cash at something is a magic fix, but because people that are capable of earning more money won't accept less.

Yes, but for the typical sort of talent that Apple, Google, Facebook, etc. want to hire, you need those things first.

Also, while those companies could start a long-term investment in an area, it's not something that could be done in a year or two, and ultimately they could only influence the process.

You need relatively successful leadership in that community to start to ensure those things happen -- the money alone isn't enough.