So unsecured personal loans? Those depend on your credit which most students don't have much/any and your debt-to-income which is normally infinite for students because they don't work. You would massively screw over kids whose parents cannot pay/co-sign a normal loan as it would force them to work and study.
Also, you normally cannot get very much with such low income and cherry on top, they have awful interest rates which range from about 6% to 36%. The APR on loans for borrowers with excellent credit is around 12%; it's about 29% for bad credit borrowers which students with no credit are likely to be.
As an example: say you work at target for 2 8 hour days on the weekend making 15 an hour and with a 36% debt-to-income ratio limit, you could afford a payment of $374.4 a month. $15,000 punched in a 30 year repayment at 29% interest rate equals a $362.57 payment. So you might be able to do it but I would hate to be working every single day between weekend work and weekly school and that is assuming an entire 4 year degree could be pushed to to $15,000.