Internships are becoming common requirements for graduation in many colleges and they are moreover are becoming standard (which is to say calculated into saved costs) budgetting at many US corporations
From Ross Borlin's Op-Ed in the NYT:
The uncritical internship fever on college campuses — not to mention the exploitation of graduate student instructors, adjunct faculty members and support staff — is symptomatic of a broader malaise. Far from being the liberal, pro-labor bastions of popular image, universities are often blind to the realities of work in contemporary America.
Far from resisting the exploitation of their students, colleges have made academic credit a commodity. Just look at Menlo College, a business-focused college in northern California, which sold credits to a business called Dream Careers. Menlo grossed $50,000 from the arrangement in 2008, while Dream Careers sold Menlo-accredited internships for as much as $9,500.
To meet the credit requirement of their employers, some interns have essentially had to pay to work for free: shelling out $2,700 to the University of Pennsylvania in the case of an intern at NBC Universal and $1,600 to New York University by an intern at “The Daily Show,” to cite two examples from news reports.
Charging students tuition to work in unpaid positions might be justifiable in some cases — if the college plays a central role in securing the internship and making it a substantive academic experience. But more often, internships are a cheap way for universities to provide credit — cheaper than paying for faculty members, classrooms and equipment.