Sollozzo said "..Blood is a BIG expense". All of the guys mentioned couldn't determine when someone had to go and it cost them and their organizations immensely.
I think that when you get rid of someone generally speaking it had better be for a reason that everyone else in the family could agree with and understand because otherwise you make a lot of very dangerous and greedy men more frightened and paranoid.
Also in a lot of these hits discussed there were quite a few people involved. It seems like one would want to limit the people directly involved. You can't inform on what you don't know about.
"When the snows fall and the white winds blow, the lone wolf dies but the pack survives."
Winter is Coming
Now this is the Law of the Jungle—as old and as true as the sky; And the wolf that shall keep it may prosper, but the wolf that shall break it must die.
As the creeper that girdles the tree-trunk, the Law runneth forward and back; For the strength of the Pack is the Wolf, and the strength of the Wolf is the Pack.
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