As I said, the usage of the spyware is authorized by a judge (that is a separated entity from government and not really friend of the actual government, in general) or by the COPASIR (that is composed by a balanced mix of all parties and the president is from the oppositions).
Italy has some critical issues, but it's still a rule of law state.
I think that in the past, the situation was a lot more worrying than now. Think about Ustica, Bologna station bombing, etc.