In short Joe many of Labours future voters are scum of the earth Calais tent dwellers, so called "asylum seekers" ( male economic migrants who have abandoned their families), petrol station cashier "students" - basically fly by night, uneducated or chancer crap. On a points based system we need to be certain that the degrees or whatever other qualifications they hold are genuine not Lagos Microsoft Certified Engineers or some North West Frontier "Medical School" con men
Does that explain it ?