回复7楼:你米国主子多年来一直有囚犯劳动。
现在米国在押120万囚犯中的80万就是劳动犯人。
https://www.aclu.org/news/human-rights/captive-labor-exploitation-of-incarcerated-workers
Our nation incarcerates more than 1.2 million people in state and federal prisons, and two out of three of these incarcerated people are also workers. In most instances, the jobs these nearly 800,000 incarcerated workers have look similar to those of millions of people working on the outside. But there are two crucial differences: Incarcerated workers are under the complete control of their employers, and they have been stripped of even the most minimal protections against labor exploitation and abuse.

美国监狱很多是私营，因为这是一笔大买卖，没关系还揽不到此种生意这也是为什么美国监狱里经常人满为患：
https://usafacts.org/articles/how-much-do-states-spend-on-prisons/
根据司法统计局的数据，2020 年有超过 120 万人入狱。 各州每个囚犯的支出差异很大，从密西西比州每个囚犯的约 18,000 美元到怀俄明州每个囚犯的 135,978 美元。各州当年平均每个囚犯的支出为 45,771 美元。