If you take out a $30,000 student loan at 6%: 1 you will only need to pay back the amount you borrowed 2 you will need to pay back only the interest on the amount you borrowed 3 once you graduate you will have a monthly payment of about $255 each month for the next 15 years 4 your parents are liable for your debt

The answer would be:

3 once you graduate you will have a monthly payment of about $255 each month for the next 15 years

Every year 6% of your debt increases as the interest rate is charged, that´s why the grand total of your actual debt is not 30,000 anymore, is 45,900 dollars once you´ve added the interests.

your answer is rising unemployment and inflation.