A full time job? Of course not, that's ridiculous and no-one should have that expectation. But 10-15 hours a week, especially if you are a recent high-school graduate and perhaps haven't had a job up until that point? I still hold that if 10-15 hours a week actually screws with your curriculars you are doing something wrong from a scheduling perspective. I worked 20-25 hours a week sophomore year on and still managed to get an engineering degree with a good GPA
Hmm, well lets try this a different way then. 100% employment is impossible. Under such a system, there will be those that fall through the cracks just because their aren't enough jobs to go around. No mater what you do, there will never be enough jobs, enough hours for everyone, so there will always be those that fall through the cracks through no fault of their own just based on that alone. That being the case, how can such a system be fair when it's based on such an impossible premise, that everyone can even find 10 hours of work each week? People shouldn't be held hostage over a factor they don't necessarily have any control over at all.
Of course it's nonetheless irrelevant because the type of reform Sanders want has no chance of getting past Congress, but when it's impossible for all students to be employed as no matter what you do, no matter how much work study or whatever there is, there will still nonetheless never be enough for everyone, requiring even 10 hours per week when those 10 hours have no guarantee of being available doesn't rub me the right way and ideally would not be necessary.