Starting in the '50s and continuing up to the present German (and French) workforces were heavily populated by "guest labor" from Algeria, Turkey, and many largely Muslim countries. One reason for this was the huge loss of population each European country suffered in the two world wars. A positive aspect to this was that the guest workers could be instilled with a work ethic which resulted in say, the legendary quality of products like the early VW beetle. The UK has had much emigration from former colonial outposts in the Carribean and indo/pakistan, but the skill-sets along with UK's dwindling industrial base haven't boded well for successful rebirth or a return to a standard of quality products.