Europe’s migration laws are set for an overhaul. The EU Migration and Asylum Pact hardens border procedures, speeds up the return of irregular migrants to their home countries, and forces the bloc’s 27 nations to share responsibility. The reforms have been objected to by the far right and left
Probably would in the long run but we'd have to live through decades of upheaval as workers in rich countries saw their wages plummet to 10% or less of what they were. Even just tiny amounts of immigration cause ultra right wing movements to start taking majorities. We would be living under fascism, and fascism isn't easy to get rid of.