Nonetheless, some degrees would be worth going into debt for, because the returns are virtually guaranteed and sizable. It'll still take time to pay off the debt, but if you choose to subsequently stay in that degree's profession, it's something you would eventually do.
I disagree mainly due to the aspect of carrying a loan, plus interest, versus income. I recently read a great article of a doctor who was literally in the poor house due to student loans. Right, everyone thinks, "Oooh, a doctor. That shouldn't be a problem." but it is. She had to move back with her parents in order to stay afloat and has been a practicing physician for over 8 years. Granted, she wasn't very wise in how she borrowed or the amounts (all of which were detailed).
She must have made some seriously bad spending decisions outside of funding the degree (and/or got into professional trouble at work/was just bad at her job), because there really isn't any reason this should happen to a doctor. Salaries are generally comfortable, jobs moderately easy to find provided you're not too fussy about where/what they are, and the money's easily enough to repay loans taken out at reasonable rates, and fairly quickly, at that.
It's true that there are plenty of doctors in both the US and UK in money troubles, but in my experience, that's because they're complete financial nitwits, not because the salary isn't enough to repay tuition loans, even in the USA where the cost is several orders of magnitude higher. Seriously, a lot of my colleagues don't have the first clue how to manage money. It's frightening, really. These are people who would get into money troubles even if they had Warren Buffet levels of income....