@PlanDeRaccordement British student loans have some elements of a progressive tax, because the more you earn, the more you pay; the less you earn, the less you pay (including zero). How many taxes operate like this? Not all but quite a lot - VAT is a regressive tax but income tax is progressive.
Again, how many loans can you stop repaying if you earn too little? And you can stop with basically no consequences, no mark on your credit file, and the ability to still get credit? I can't think of any to be honest.
All of this is why I agree with Martin Lewis that British student loans act more like a progressive graduate tax than a student loan.
The current repayment threshold is 9% of the amounts over £27k (and change).
£30k gross income --> £270 payment (per year)
£35k --> £720
£40k --> £1,170
Is it better being debt-free? Yes, sure, no brownie points for guessing that.
If a 17-year old has £100k in the bank, sure, don't take the loan, you'll be better off using that cash. But, come on, how many have that much saved upfront for them?
But for the vast majority of students who don't have an alternative, taking out a student loan isn't that bad
Martin Lewis even has a calculator on his website.
www.moneysavingexpert.com/students/student-finance-calculator/
Obviously it all depends on the assumptions on inflation and salary growth, but, just to give an idea, if you start on a £30k salary you'll repay £42k over 30 years - which is actually not too bad:
£28k salary --> £30k repaid
£30k --> £42k
£35k --> £73k
£40k --> 67k
£45k --> £61k
Obviously someone who earns a lot repay it quicker, so ends up paying less interest, but this doesn't detract from the general principle of repayment based on your income.