In other words, poor countries are doomed to stay poor if their high-skilled labor is prone to emigrate. So, perhaps not having all these visas for tech worker

In other words, poor countries are doomed to stay poor if their high-skilled labor is prone to emigrate. So, perhaps not having all these visas for tech workers is the right thing to do, from a moral perspective? On the other hand, so-called poor countries could make themselves attractive with low taxes and low cost of living, attracting business and ultimately bringing back those brains.