Carlo Gambino was the gold standard for American Mafia Bosses.Along with being cunning and ruthless,he was notoriously close mouthed,so even if he was bugged ,there wouldn't be much to go on. He didn't even have a phone in his home. Here's an interesting bit of info from his Wikipedia page. "In December 1972, on Ocean Parkway, a van began to park outside Gambino's home. In that car, sat the Federal Bureau of Investigation's (FBI) Mob squad, with cameras, lip-readers, and audio-surveillance equipment, including microphones and wire-taps that were planted in Gambino's home. The FBI was kept on a 24-hour standby, hoping to connect Gambino to organized crime. The van was marked "Organized Crime Control Bureau."

But even though Gambino had every corner in his house recorded, he knew how to conduct business in silence. According to FBI officials, they once recorded a meeting between Gambino, Aniello "Mr. Neil" Dellacroce and Joseph Biondo, where Biondo is just to have said: "Frog legs", and Gambino simply nodded. The recording tapes came out empty."

Supposedly if a man who fell out of favor was mentioned during a meeting,all Gambino would do was sigh,or lower his gaze,and it was understood that a death sentence had been passed. What sets Paulie and Neil apart is that the Feds actually obtained information from their bugs,but when it came to Gambino,it was a dead end street.