The whole point of University is to get a degree so that you can get a job which will earn you a comfortable income no? Most people will want to earn £21k or above, ergo they will be paying back the loan.
If you were to re-read my post I state that on its own the debt is manageable, quite easily, but combined with ALL the other bills it adds up. There's a reason people don't sign up for 50 of those mobile phone deals, sure it's only £20 a month and you get a free laptop/gift, but it still adds up. It doesn't matter how much the monthly payments, it will still add up.
Let's say your graduate from University this year and somehow find a job that pays you £25,000 a year and you have a student loan of £45,000.
According to
this website your student loan repayment is £75 a month. According to the Student finance website the monthly payments will be £75, you can check this
here. (note this is for courses starting in 2012)
It may not seem as much, but not only will you NOT be able to pay back the FULL amount (a burden on other tax payers) but it's £75 a month written off, it may not seem as much, but throw in everything else and it's a nice little amount which would be better off in your bank account.
Never once have I said that it's not worth going to University, you assumed this, I'm merely saying you shouldn't go around saying "Don't worry about it, take the loan and get a degree", people should think about it carefully before taking the loan and going to Uni. There's a reason so many people were protesting against the fee rise.