I'm surprised people are surprised that such a thing leaked. This has been going on for years, except, no one batted an eye.
> We are Italians and we are unable to respect the rules.
As an Italian too, I don't like this generalization. You can make people more willing to follow rules if you approach them correctly. Going full-paternalistic mode (like this government has been doing) or even blaming them ("don't play dumb", is that something one would expect from a PM?) isn't going to help.
And why that happened? Because whoever is in charge of making sure that the population is reassured (and that's different from pretending that nothing is happening) did not do that.
(Personally, I believe that it's those who not do what should be done are the actual outliers, although the media does an excellent job at cherry picking bad apples).