http://www.versobooks.com/books/797-intern-nation

Every year, between one and two million Americans work as interns. They famously shuttle coffee in a thousand newsrooms, congressional offices, and Hollywood studios, but they also deliver aid in Afghanistan, build the human genome, and pick up garbage. They are increasingly of all ages, and their numbers are growing fast—from 17 percent of college graduates in 1992 to 50 percent in 2008. A huge and increasing number of internships are illegal under the Fair Labor Standards Act, and this mass exploitation saves firms more than $600 million each year. Interns enjoy no workplace protections and no standing in courts of law—let alone benefits like health care.”