well I am talking in their basic simplest form. You are now getting into the layers of the two. Politics are created to divide & conquer. You divide the Masses you now control the Masses. But in simplest form. They preach hopes & fears to manipulate their people for their needs & they will change accordingly to keep that power over their people.
Politics if done the way it was meant to be. Would be a better form of politics. But it is corrupt. So its not.
Same with religion. People like you who become religious to make themselves a better person. I am all for those types of people. But realistically Religion is used for power. & even those ignorant of their own religion often act better than the next guy, (those were the ones I used to love to debate with) So in its own right. Religion is very corruptible of the mind as well. But to your point. I would say the percentage of politicians is much higher than the religious person. But any high ranking (lack of a better word) religious person, are almost all corrupted as well.
I'll be honest with ya. I grew up in the streets & some of the shadest (& in a way heartless) people I have ever met have been some religious person with some status with their church. So some of you good people may not see it. (or want to see it) but it is there in religion as well as politics.