All true, also pretty often made guys borrow a ton of money (even if they don't need it) from the boss/underboss as a life insurance policy so they will be too valuable to kill.. I think Burton Kaplan did this with Gaspipe Casso.
-I shot him a coupla' times. -What's a couple? -Hmm, more than a couple... Really I don't know the exact amount, maybe I shot him 10 times, 12 times? -Maybe fifteen? -Hmm, it could've been fifteen...