Jack looked around at the other assorted members of the theive's guilds. None of the guilds had send a decent warrior or infiltrator... likely, if he hadn't been so new to his guild, he would have been forced to stay behind. Well then, he could take a position of authority here; none of them could stand up to him.

Jack stood, and spoke clearly and loudly: "this plan has the full support of the Associated Guilds of Thieves." There. By opening with his support of the plan, he could play this as he wanted. If it failed, he could blame it on his asshole of a superior; and if the plan worked, they would remember that it was he who stood to speak first in support. He would make them remember.