JPMorgan CEO Jamie Dimon thinks artificial intelligence will vastly improve people's lives, predicting 3-and-a-half day work weeks and cures for cancer. But he also said the technology could disrupt the labor market, requiring public-private approaches for retraining workers. "I believe that 30 years from now... your kids are probably working three and a half days a week. They'll probably live to 100, and a lot of the diseases that afflicted a lot of us, they won't get," he told "CBS Evening