Could it be that the act of completing college, getting jobs, and beginning to pay taxes has anything to do with the change of thought?
No, I imagine completing college, having to take a low pay, no future McJob (or several at 15 hours a week per McJob) and having $50K in student loan debt that can't even be discharged in bankruptcy probably has more to do with it. Those kids aren't making enough to pay spit in income taxes.