Jack wasn't interested in prolonging his debate with Master, he had a more important thing to do. He had an appointment he couldn't be late to and a quest he needed to take care of.
Yesterday, after visiting Talia and returning to his body, he found that he had automatically received a new quest.
*
Help Talia Escape
Difficulty: SSS
Rewards: 8,000,000 exp, 100 gold coins, 10,000 mana core, additional rewards possible
Resolve the situation in the Council of Charites and release Talia from her imprisonment
*
So, Jack stopped speaking to Master and pretended to sleep.
The others gave Master unfriendly looks. To them, Jack was now a hero. Master who ridiculed their hero was now someone they didn't want to be associated with. Jack might have decided Master be the leader at the start, but from now, they would only listen to Jack.