Julien and Bernard, friends in the same commerce program, find a summer internship in a company that hired $2$ interns. The positions have the same title and responsibilities, but report to different team leaders. Both team leaders are under the same manager and in the same business unit. Julien learns that Bernard's compensation is $11\%$ more than what he is being paid, although they both have similar prior work experience and education. Julien feels that this employer provides unfair compensation and begins looking for a new job; what is this an example of$?$