this is a failing strategy given that sources of that workforce has already a sub-replacement birth rates. You are essentially draining other countries of its

this is a failing strategy given that sources of that workforce has already a sub-replacement birth rates. You are essentially draining other countries of its population to temporary plug in your hole. Also a rapid migration from clashing culture backgrounds will introduce permanent cultural frictions and clashes into host country, all for a temporary increase of workforce. The sub-replacement birth-rates is the biggest problem the majority of developed countries are facing now