Again just being the devils advocate here but if all these guys want is a career in modern jets, do they really need GA experience?
Would you have brain surgery done by a 21 year old surgeon fresh out of uni? Surgeons only have 1 person's lives in their hands at a time and it takes 10 years + to make a surgeon. How many people does an A321 seat again?
I have never flown anything bigger than a bug smasher twin but i really don't belive that someone who has 250hrs TT can be as capable (especially in non-normal situations) up the front of an aeroplane that weighs several hundered tons as somone who actually has some experience. I know i couldn't fly for
as a fresh CPL and I still have a hell of a lot of learning ahead of me before I would feel confident enough in my own abilites to have a couple of hundred punters down back.