Most won't have to pay it back so what is the block for people going?
When I was uni age only a small percentage of people went - The blair push created this as its unaffordable and not productive
This even by your standards is nonsense
But if they're not going to earn enough to pay back the loans, what's their incentive for going onto the course in the first place? It's a waste of time and effort.
While I agree the expansion of HE has created a lot of 'fluff' courses that have reduced the worth and prestige of a degree and thus made a system that cannot be funded by the public purse, the desire to get a greater amount of talented people from poorer backgrounds into HE was a good one. It's Ok only having a small percentage in HE, provided they're the most worthy regardless of background and those that do not have their worth recognised.
It's a totally different argument, but giving more value to technical/vocational qualifications and getting HE places on merit, not background is the way forward.
The first is achievable with a change in perception from the top down; the second much harder as those in state education are automatically disadvantaged as public school kids are basically spoon fed to give the right answers whereas state school they largely have to get left to their own devices while teachers deal with unruly kids in overfilled classes.