Scarpa, as the 3rd and 4th generations of foreign guest workers have found out ,you cant fully assimilate into the german society fabric,and a lot return to their country's of origin,thus the available pool of cheap labour is relatively small.
One doesn't have to have an economics degree to understand that this shortfall would put pressure on pay rates for menial work ,I'd say London to a brick,its the employers pushing for this refugee intake.
Gee, I suppose anyone with a rental property would do quite nicely out of it as well,food producers,its gotta be the capitalists pushing this through.