Martin Luther is to the RCC as Sarah Palin is to the liberal/elitist Establishment.
Pope’s of that time were more powerful than Kings. The Kings always did what Rome said, so long as they had the Pope’s blessing they remained in power. Go against the Pope and you were asking for trouble. I guess that Luther apparently had enough of that, he saw corruption and exposed it. Many of the Popes should have never been made a Pope to begin with. Extortion comes to mind. If Palin is our ML, then she has my vote for sure. (She has my vote so far.)
Popes of that time were more powerful than Kings.
Gregory VII died in exile in 1173, and Philip the Fair ran all over the Pope at the beginning of the 14th century. Could you come up with three instances before 1173 or after 1300 that would prove your point?