It would reduce the incentive for low-wage workers to get an education and move up to a higher-paying job. The lower the minimum wage, the more eager a minimum wage worker would be to enroll in a community college course at night, improve his or her skills, and apply for a higher-paying job. Making the entry-level jobs higher paying increases the risk that workers will get stuck in them for longer instead of moving on to something more rewarding.
The last nugget of “gold” for now – http://reason.com/archives/2014/03/03/9-reasons-why-raising-the-minimum-wage-i