“Vito Corleone had decided to murder Fanucci. By doing so he would have an extra seven hundred dollars in his bankroll. The three hundred dollars he himself would have to pay the Black Hand terrorist and the two hundred dollars from Tessio and the two hundred dollars from Clemenza. If he did not kill Fanucci, he would have to pay the man seven hundred dollars cold cash. Fanucci alive was not worth seven hundred dollars to him. He would not pay seven hundred dollars to keep Fanucci alive. If Fanucci needed seven hundred dollars for an operation to save his life, he would not give Fanucci seven hundred dollars for the surgeon. He owed Fanucci no personal debt of gratitude, they were not blood relatives, he did not love Fanucci. Whyfore, then, should he give Fanucci seven hundred dollars?
“And it followed inevitably, that since Fanucci wished to take seven hundred dollars from him by force, why should he not kill Fanucci? Surely the world could do without such a person.”
— from The Godfather, by Mario Puzo (1969).