Cain turned to Win Wallin, the president of Pillsbury, for help. “I can’t get to your job from where I am,” Cain told him. “What do you recommend?” Wallin suggested getting on the operations training track in the company’s Burger King division, which could lead to being a regional vice president. “If you want to run a business,” Wallin said, “you have to start at the bottom and learn it from the ground up.” It would be an unconventional move. Cain would have to resign his title, give up his company car and nice new office, and forgo stock options...