95% dont work, they dont speak German or have the required skills. its a false economy. This is why Germany is desperate for other countries to take "Their share", theyve worked out how much it will cost if each military age male brings a family in, on benefits. Thats thes the next bomb to go...
Or you could ban abortion to raise birth rates. You are in effect advocating one problem in an attempt to solve another. Also investment is increasingly geared to the old where it should be in the young, this is something else not sustainable.