It is possible to link all of these happenings by the single term "slavery" but that does not make it prudent for the course of communication. In your original post you elucidated images of chattel slavery, the actual written right to own another person within the law, which does not exist in the United States. In practice there are other forms of slavery, of course, as you demonstrate, some more subtle and some less.
But don't fall into the trap of over-applying the label, particularly one as loaded (in the US) as slavery.
Also, your smugness is... well, smug. Yes. Yes I did know about that. Stick to the information and cut out the assumption that you're delivering a revelation, because you're not.
However, I appreciate your bitterness and rage towards the unfairness of the world.