No, because tax evasion in Italy (like nearly everywhere) is getting more and more difficult. Credit card use is on the rise, event at small restaurants, so there's much less income which can be hidden, and the Italian government has also forbidden the use of cash for transactions over a certain amount. Could be 1,000 € but I'm not sure.
Only legal businesses will be complying with this € 1,000 limit on cash transactions. Can the Italian government enforce this measure on the members if he
Cosa Nostra and the
Sacra Corona Unita? I don't think so. They will continue to earn their drug money in hard cash and then they will send that money to Geneva. During the next tax amnesty, this cash will flow back to Sicily and Puglia.
Oh, yes, drug money, but that's only the very top of the iceberg. I guess most undeclared income will now come from drug money and prostitution, but only a few years ago, that was the opposite. Most undeclared income was coming from legal businesses.