Some banks offer "interest-only" loans (which, IMHO, is poor practice, as it essentially keeps the client in debt indefinitely). It's very possible that every penny you're spending is only on interest, which is pure profit for the bank.
The advantage there is how much easier it is to handle the debt burden while on the limited budget one usually has while still in school and while looking for better paying employment.The dis-advantage is you still have the debt burden waiting for you (which is why you pay off more than just the interest whenever you can as fast as you can.
'hide a loophole'? You could apply that logic to any contract.