This is about people who can not walk away, people who are forced to work without pay, people who are operating 24/7 under a threat of violence and have no pay.
奴隶们的自由被剥夺了，他们不能离开他们的主人， 奴隶们被迫为他们的主人工作，却没有工资， 奴隶们片刻不得休息， 因为他们时刻生活在暴力的威胁下， 即使如此，他们仍然得不到工资。