The other poster covers it in greater detail, but after 6 months they expect payments, and deferring them only lasts so long (and I don't know how long).
And you can't ever get rid of them.
The answer still isn't to bail everyone out. It just perpetuates the problem. If higher education is to be a for profit business (at least in many cases) you can't create artificial lending markets like student loans, it just causes the absurd bubble that has popped up in the US. It should be flat "heres the cost, go try to get a loan for it" like you would a car or house. When the government starts handing out free money no questions asked with a repayment plan, schools just pile that on top of their tuition fees as profit.
It doesn't hurt that we really should be looking to having online certifications for either free (MIT courses, etc) or extremely low cost. While the K-12 years also have a function as day care, hopefully adults don't require that cost, and stuffing them into giant brick buildings often thousands of miles away for months on end is really inefficient.