The worldview you have is pretty unrealistic, we have limited resources, it is unrealistic to think that we can house and feed the entire worlds population who wants to come here.

Oh and allowing for unrestricted migration will also lead to a massive brain drain, reducing the ammount to people with the skills that a poor country needs to develop and turn into a prosperous country.

I completely fail to see the logic of how allowing the unrestricted migration from a developing country would benefit the developing country at all.

Allow for travel and temporary visas for studying in the EU, even lower the cost significantly for people from poor countries but a requirenment is that they need to go back after finnishing their studies and actually practice in their field of study.

Brain drain is a huge issue for any country, especially poor, so let's help them stop it.