Marlene, a shift manager at Bargain Interiors, told her roommate, "Work isn't much fun right now. I acknowledge that I have very little experience in the retail industry, but I just can't get my floor staff to perform their duties unless I use discipline. Over and over, I'm threatening to cut a nonperformer's hours unless he or she improves performance. That seems to be the only way that I can exert influence over them to make them perform their duties, but even then they don't respect my position as their manager." Based upon this discussion, why are Marlene's floor staff willing to comply with her direction