This is assuming that emigration of a poor uneducated population will not result in a prospering economy. At the very least, this hypothesis cannot be confirme

This is assuming that emigration of a poor uneducated population will not result in a prospering economy. At the very least, this hypothesis cannot be confirmed by the history of the United States, and, as a matter of fact by the prison islanders of Australia. German population was considered to be shrinking for a long time, but in fact it keeps growing due to immigration. Is it easy to integrate people? No. Will Europe collapse? No. Will it change? Yes. Will it continue to thrive? Most probably.