The surprising logic behind the use of check cashers and payday loans

Often seen as predatory, the check cashing industry has been booming. Lisa Servon wondered why lower-income people who were struggling would cash checks instead of getting a bank account, so she took a job as a cashier to find out. What she learned -- that it’s often cheaper -- is the subject of her new book, "The Unbanking of America." Economics correspondent Paul Solman reports.