You forgot that the vatican receives over 6 billion euro per year from the italian state, plus free services as water, sewage tratment and so on for over 3 hundred million euros. Moreover, they receive money for catholic schools (after Berlusconi, much more than the public scools), and get a share of the communal urbanization taxes.

It has been calculated that if the Italian State ceased any giving to the Vatican, no more financial measures or taxes would be necessary to fix the italian economy.