To be fair, Gigante lasted decades before he was finally brought down. And he didn't even get life, he got a mere 12 years If he wasn't already so old, he wouldn't have died in prison. Amuso and Casso caused their own problems, they basically handed themselves to the government, just like Gotti. Gigante's downfall was brought about by a single rat, Peter Savino. If Savino had died sooner, they wouldn't have gotten him when they did.