Remember that the mafia is a changing organization that can adapt from the time changing. In Sicily they say "calati juncu ca passa la china" which means "decline cane, until the storm passes". I think some of them mobsters learned from the big indicments of the 80s and 90s and are more secretive. That is why the mafia still lasts today, because they can adapt and change.
That is maybe 1% . There are very few aspiring wiseguys today, plain and simple. Italy still has high unemployment so a gravitation towards crime is more expected. There are far too many legitimate opportunities here.
Another huge reason : years ago if a business was shaken down, victims were afraid to go to law enforcement because the mob had a rep for having cops and public officials on their pad. A victim would fear that a crooked cop may get wind of them complaining.
This is another reason why the mafia still exists in Italy: there is still alot of corruption.
