No interest while you're a student (reasonable I think) but then market interest rate once you leave which I think is fair enough since you should be earning a decent amount, enough to pay back the loan you got out at a decent rate.
I don't think the government 'make' much money on them since they have to raise the debt themselves and probably only pay a couple of % less on it themselves - which is probably made up for by the extra risk the government carries that you'll fuck off overseas and not pay your debt back, or that you'll go bankrupt etc.
Try and find a bank that'll lend you $33,000 unsecured on anything but your 'future earnings' at the moment eh!

I'll bet it'll be a lot more than 8%.
But anyway, I suppose right now you'll have to save like crazy and get a better job. :-/