Living the "American Dream" is getting harder, as prices rise faster than average wages, and work itself shifts toward a gig economy. How and why did this happen, and how might things change from here? Economic historian Louis Hyman, an associate professor at Cornell University, and author of "Borrow: The American Way of Debt," and "Debtor Nation: The History of America in Red Ink," talks about the emerging gig economy and what it might mean for America's future.