Wikipedia article about this documentary.
Philosopher and author Henry David Thoreau, who deeply considered many issues, also wrote about corporations: “I cannot believe that our factory system is the best mode by which men may get clothing. The condition of the operatives is becoming every day more like that of the English; and it cannot be wondered at, since, as far as I have heard or observed, the principal object is, not that mankind may be well and honestly clad, but, unquestionably, that the corporations may be enriched.” A week on the Concord and Merrimack rivers ; Walden, or, Life in the woods ; The Maine woods ; Cape Cod (pp 343–344) (emphasis not present in original)