The Catholic Church would have to be one of the greatest criminal organisations on this planet.
Abolishing the Vatican's Sovereignty would be a better option than just taxing them.
If you like some serious intrigue including everyone from the Vatican to the Mafia to the Freemasons; Google ' God's Banker scandal'.
Meanwhile over in England................
Vince Cable calls for criminal investigation into Barclays bankers | Business | guardian.co.uk