People with degrees start life later, and often times with a lot of debt. They are organized in the most traditional sense, and will probably be buying a home a few years after graduation. This debt load makes mobility hard, and the chances that the person is living paycheck-to-paycheck are a lot higher. However, unlike someone with less earning power living paycheck-to-paycheck, the person with the degree will have a higher chance of having more to lose. You want the employee that needs you, not the one that will just wander off and say fuck-all when they're pissed at you the employer; they don't have anything, much less anything to lose, so why put up with you? The college grad has a credit score, mortgage, car, and family to protect.