"A study by Wharton professor Matthew Bidwell showed that external hires into a company get paid 18-20% more than internal workers who are promoted into similar jobs. (Gratingly, they also perform worse for the first two years.) That’s patently unjust, but it points to an important truth: professionals are often taken for granted inside their own organizations."<p>It always amazes me that this has never been rectified within the corporate culture. Maybe the percentage of employees that look is so low that the risk of losing them isn't worth the cost of proactively keeping them happy with their salary?