Why did Grima Wormtongue and Saruman betray his friend Lotho Sackville-Baggins when he was their ally and helped them take control of the Shire and establish a base of operations there?
Lotho Sackville-Baggins was Sarumans friend and ally inside of The Shire, why kill someone who is helping you attain power? Also wouldn't keeping him alive have possibly prevented Saruman from being killed later and given him mercy from the Hobbits?
You have to wonder what date Lotho Sackville-Baggins would met if he was alive when Frodo and his friends returned home? Just accuse Saruman of forcing him into compliance because of his voice and maybe jail or even death for treason? Maybe being exiled and becoming a vagabond in Bree or Middle Earth himself?