Millennials have a wandering eye when it comes to employment. They're looking for the next opportunity after just a year on the job. That's in stark contrast to Baby Boomers, who believe five years at the same employer means just getting started, according to a new report from PayScale and Millennial Branding. But with salaries meager, and stagnant at that, job hopping becomes the mechanism by which Millennials trade up and score more lucrative positions. While there are accusations that Millennials are disloyal when it comes to employers, their tactics stem from necessity -- as they face underemployment and mountains of student loan debt.