Ok, and what's your point? Some people don't get the same opportunities, therefore they should all move to countries which are doing well? What are they going to do once they arrive? Most of them are uneducated, don't know the language and don't have any valuable skills. How are they going to survive in these crowded, overpriced cities?

They can't all live on welfare payments.

That's why I support helping their home countries develop, funding education and healthcare, sharing agricultural and manufacturing knowledge. It'll be better for everyone if they turn their poor countries into developed economies.