Income of a student's parents shouldn't affect what the student is entitled to, beyond the current system which is fair enough - I didn't know the limit for means-testing was £60k though. You could say that should be reduced, but then families with 2 kids to pay for...etc.
Among my friends there's an entire range - friends with poor parents who are nontheless spoilt, friends with millionaire parents who have to fund themselves.
It's really down to the individual student; making a middle class student pay more will have no effect on those who waste money as they'll simply borrow/scrounge more to fund their unsustainable student life.