The man who wants America to “think harder” has parlayed his quixotic presidential campaign into front-runner status in New York’s mayoral election. And he has some big plans.

Backers of a $15 federal wage say it’s a no-brainer if you want to fight poverty. Critics say it’s a blunt instrument that leads to job loss. Even the economists can’t agree! We talk to a bunch of them — and a U.S. Senator — to sort it out, and learn there’s a much bigger problem to worry about.