[aleph_minus_one]

> The best people leave the country because the can earn orders of magnitude more money in the developed world. This is why countries like the US keep being so successful while developing countries stay poor.

> It is just the rational best decision for a young people to try their luck abroad and earn more money that they could ever dream of in their home country. Why shouldn't they? Idealism? There is nothing wrong with striving for a better life, it is what moves humanity forward.

I rather believe that the central reason why they leave is not because of the possibility of earning much more money, but because the existing country keeps such people on a short leash with respect to implementing their ambitions. In other words: if you want idealistic people (who stay in their country), better ensure that the country has a culture in which such idealism does not backfire and make such people's life harder.