Its absolutely this , the wage they get is a fortune back home. Worked with half a dozen young eastern European couples that have built new houses back home while working here , now gone back.
The South Asian contingent work for a few months and then take a couple of months off , in general they life in big family set ups so come and go with family commitments.I have worked with a few that have arrived here through first Spain, then Germany and ended up in Italy ,came here and dipped their toes in the water but our NHS is not good enough for their sick kids.
Sacked us off and gone back to Italy , had financial help in every European country they passed through