Job Advancement
In many cases, students who work during college gain promotions to high-paying positions before graduating. If a student is making enough money to live on, it's common for that student to forgo finishing college. School would require him to work fewer hours or give up the chance at a promotion. This is especially the case with students who take internships in college that turn into jobs. Once a student has a position in his field, he may not return to school to finish his degree.