People involved in OC on the island are way more powerful than either the Cammora or Ndrangheta, they have been around for centuries longer than either of them, and it's always been like this and still is like this.
There have been changes in Cosa Nostra though. First, Toto' Riina whacked everyone who was good at dealing with the politicians in charge of the country and wasn't very good at doing so himself, so he started whacking politicians as well, so they stopped protecting him and allowed him to land in jail with the whole commission. Whatever happens now in the Cosa Nostra, it's different compared to what it was before. The 'ndrangheta was never heavily hit by the state (or it would be more correct to say "by the one part of the state that is still honest") unlike the Cosa Nostra because they almost never attacked the state directly, while Riina and his goons were stupid enough to kill many policemen, judges and politicians and therefore ruined a considerable part of the organization with their idiotic behavior. The mafia had to spend time to recover, while the 'ndrangheta didn't have any need to.
