Priest, bishop, archbishop, and pope are ecclesiastic classifications; they don't measure holiness or sinlessness. You gotta hope that a man of the cloth like a priest, minister, or preacher would be more spiritually mature, but obviously it doesn't always work out that way.
I've been lucky to know many priests who were prayerful and wise men, whose spiritual purity would shine from their lives.
As for holiness, no human can judge that kind of thing. If there are some people in the world who are holier than others, only God knows it.
It is a sin to expect God to pay you for doing work for the church. Pastors, Bishops, Popes are all people that are con artists and they con the people and God out of money. Churches can run without paid positions. Just look at the Mormon Church.
A priest or a pastor is supposed to teach you the bible. Popes are like a cult leader. Since some priest and pastors, etc.. do bad things that means they are sinning. Everyone but God sins because of adam and eve.