Power + Easy Availability of Minions = Very Very Bad

Well, this happened just a few minutes ago. Some senior was in charge of delivering a few costumes to a place in Ulsoor, and she delegated Guhan to do the job. Now, she told him that he could take anyone he wanted for this trip and both would receive attendance make-up for it. He asked me if i was willing, and since i had no classes at the time, i agreed. While picking up the costumes from her, i was unable to recall her name. Big deal right? Not to her. This is what she said, "Don't take him with you. I'm not giving him any attendance make-up." I didn't have the heart to tell her that i didn't even need it in the first place, and that i was doing it just to help out.

Point is, why is that holding even the slightest amount of power do this to certain people? I mean, is it cool to throw your weight around just because you're one notch higher than someone else on the totem pole? The thing is that i could have mouthed her off because i really had nothing to gain from doing her this service, but i didn't. Maybe next time i will...