American workers received an average raise of 3 percent last year — an amount that was actually the largest such increase in 10 years. When compared to all-time-high corporate profits over the decade since the end of the recession, there’s a big disconnect. So what is keeping workers down while executives thrive? Former New York Times labor correspondent Steven Greenhouse argues the decline of unions is a big part of the problem. He makes the case in his new book, "Beaten Down, Worked Up: The Past, Present, and Future Of American Labor."