Inmates is the right word. We were able to see three or four of the guys gazing out of two smallish windows/openings covered with bars at the bottom end of the closed-in covering of the van. Caged. I asked Noi whether she thought they had a fan in there but she thought this unlikely. We looked for signs of decent ventilation as we came alongside the vehicle. There weren't any.
My guess is that none of the guys on-board would have thought there was anything to really complain about. They'll consider themselves fortunate to have found work here. So that makes it okay to treat people like animals, I suppose. Nothing exceptionable here.