If we all agree that grades don t matter then we have the power to whatever we want. We could just sit through the whole semester not saying a word or not even coming to class for that matter but people are concerned with grades because they feel that a better grade or a combination of good grades will help them in later life. Having the resources also means having power and thus having the influence to make people do what you want them to do. Grades are these resources and to receive them students must be obedient. Obedience and power go hand in hand.
Power is the ability to make people be obedient or become so.
The leader is able to fashion his followers by using their natural tendency to follow against them, in either a positive or negative way. Hitler used this in a negative way. Gandhi used it in a positive way but they both used it, don t be fooled. They were able to manipulate their followers into going along with their ideas. Their followers were obedient.