THE INTERPRETER: Mass Incarceration, Prison Labor in the United States : According to a Mother Jones article in 2015 somewhere between 30 and 40 percent of California’s forest firefighters are state prison inmates with some 4,000 working at any one time on fire lines. So dependent on the inmates was California that prison reforms that would see the release of some of the incarcerated firefighters were put on hold for fear of losing the manpower to fight California blazes. Then California attorney general Kamala Harris, now a US Senator, was behind the effort to keep the “cheap” firefighters behind bars.