The squeaky wheel

Have you ever noticed how the squeaky wheel seems always to get his/her way? It is so frustrating to see people who are rude and some downright mean get what they demand because of the way they demand it. Being polite and decent should be what is rewarded, not being rude and ugly. I have to tell myself when dealing with a person like that what comes around comes around, but it is still exasperating when you are in the middle of it.