> What's the point of investing the money into education if the people study in poor countries and then move to the rich countries?

The point is to make people happy. That people that emigrates has an opportunity that would have never had. Some of them will come back bringing other countries knowledge.

That doesn't mean that you are wrong. "Brain draining" is a real problem.

I like the logic of "What if we train our employees and they leave? What if we don't and they stay?"