Whenever I see reports on things like college grads making minimum wage, I write those people off as unambitious. I could get a job making more than minimum wage in two days, and I could probably get one with healthcare too. Of course, I live in an area where the minimum wage is $7.25, so the labor market has pushed the starting wage higher than that. If you live in an area with a $15 minimum wage, then the fact that a college grad might start out at $30k/year doesn't surprise me so much.
Also wanted to add, most unpaid internships are illegal. So go ahead and take one, and if you don't get hired at the end, sue.