This is a terrible policy on so many levels.
Gov't interference in college education is one of the biggest problems in the spiraling costs of education. And it's relatively simple to understand. Presently, the Federal government will guarantee a loan to a 17 year old kid. No questions asked. No question regarding your major, your competence to complete the coursework for the major, etc. Just a blank check to a 17 year old kid, most of them having no clue what they want to do with their lives.
Colleges have a relatively fixed number of freshmen seats nationally. Each of these colleges want to achieve a certain selectivity. That is, if they have 2,000 open seats in their freshman class, they may want at least 5,000 applicants, so that they get the quality they're looking for. If they can increase tuition rates by 12% next year, and still get 5,000 applications for their 2,000 seats, they're crazy not to do so.
By giving these kids what looks like free money to them (i.e., you don't have to start paying back until later. "I'll gladly pay you Tuesday for a hamburger today..."), they go off and apply to colleges, without really asking any financial questions, and the colleges aren't transparent about the percentage of freshman that graduate, what percentage of graduates secure a full-time job within 6 months of graduation, or what the average starting salary is for those who secure a job, listed separately for each of the majors.
So by offering kids all of this money that looks free, there is a flood of applicants applying for a fixed number of seats nationally. What happens when extra dollars are chasing a fixed supply of a good/service? Prices rise. So the government has been the driving force that created the problem, and now they want to "fix" the problem by pushing the costs of those unpaid loans onto the taxpayers. So the colleges won't change their behavior, the government is still writing blank checks to poor creditors, and passing the cost to those not stupid enough to have taken on that debt in the first place, or paid their debt.
So why won't we all be back in this same situation 5 years from now? It's sometimes difficult for me to fathom just how stupid politicians are.