Joe, the US isn't going to arrest the Pope -- for several reasons:
1) Political fall out would basically be political suicide (you might was well just paint a bullseye on yourself, give people loaded guns and make yourself an easy target).
2) The Vatican is a close ally with the US.
3) The Pope doesn't live in the US and he isn't going to be extradicted.
What they need to do to address this is go after the HIGHEST official they can find who knew about the situation. This would be a REAL wake-up call for the Catholic power structure (and that's exactly what it is -- there is tremendous power, money and influence in the Catholic system). You send him to a couple of years in jail and everything would vastly change, IMO.
Now, as for why it's happening -- I wanted to draw out what wk said:
sexual restraints put on members by the church doesnt all the sudden turn a straight male into a homosexual pedophile. There was something about those people that make them at least partially messed up i the head prior to any church involvement.
This is EXACTLY right -- and I'll disagree with Joe here -- while rape is a crime of power, I'm not sure that I would agree that pedophilia is. This seems to, most often, be a crime of training. I have actually worked with a few children who were sexually abused -- and in each case the abuser was abused as a child. It's a VERY vicious cycle -- I'm not saying it makes it right but I believe it is probably true of the majority of abusers. Now, when you have THIS kind of numbers and severity in the priesthood -- this causes me to stop and say "hmmm." There seems to be a rampant problem with homosexual pedophilia in the Catholic church -- and I would proffer that when it's THIS bad, it's being taught (or at least someone or someones are abusing priests and TEACHING them to abuse children -- not saying that they are saying "this is what you need to do" but simply teaching them that it's "okay"). And when they "higher ups" simply move them from place to place rather than deal with the sin -- it makes me believe even further that this is the case.
Granted -- this is my hypothesis but I would love for an EXTERNAL organization to be tasked with getting to the bottom of this -- because I don't think you get this many abusers without having a LOT of abused priests. And IMO, not all of the abused are becoming abuser priests -- making the problem even BIGGER than we see.
As for the Catholic Church as a corporation -- go back and look at the power they exerted during the middle ages. Before this time, priests would say "God absolves you of your sin" -- during this time they changed it to "I absolve you of your sin." That's a BIG difference, IMO. They took the power of forgiving sins away from God and took it upon themselves (well, at least in the eyes of the people). Not to mention, salvation (as a Catholic) comes from attending mass and receiving the sacraments. They believe in what is called "transubstantiation" -- which means that they believe the wafer and wine actually become the literally flesh and blood of Jesus Christ -- which is what takes away their sin. Without the sacraments they are doomed to hell.
Now, for added twists -- during the Medieval Ages, priests (but esp. Bishops, Archbishops, Cardinals, etc.) rose to GREAT power -- many times even greater power than Kings. Because the priests, etc. had the power of SALVATION (through the sacraments) -- and if the King, Lord, etc. didn't give them what they wanted or do what they wanted, it was not at all uncommon for priests to refuse sacraments. Not saying that ever priest, Bishop, etc. acted in this fashion but it definately wasn't uncommon (see the story of the Three Musketeers -- which is of course fiction but based on the common thread of the day in which many Cardinals, etc. were often power hungry and greedy). There are many of the great churches built during the Middle Ages that were built as a result of the power of salvation that the priests wielded far greater than a knight wielding an iron mace.