Tim Harford presents the first episode of the new season of Michael Lewis's Against the Rules. It wasn’t that long ago that coaches were confined to sports. Now they’re everywhere. Who’s getting all this coaching, and who isn’t? Credit card companies are making billions of dollars off of people who don't understand the rules of the money game. Can a good coach help level the playing field? Learn more about your ad choices. Visit megaphone.fm/adchoices