slavery, enslavement, the mechanism of control are wide and myriad. I find it rather funny that your view of slavery is apparently limited in scope to Hailey's roots story.
Haley plagiarized part of his story from a novel, fwiw. But, I think that the problem here is that the word "slavery" is like a convenient metaphor for oppression. That's fine. The word comes from the description of "Slavs" used by their oppressors. It's true; it's helpful to differentiate the type of "slavery" one is talking about. We, in the US, usually refer to the chattel, perpetual enslavement of Africans. The American revolutionaries rebelled against economic "enslavement" by the British, or the one that would come if they lost the war. We don't talk about the colonists being slaves, though. Nor do we really address the conditions of indentured Irish, although we sometimes spend time examining the Chinese rail workers. And, then, still sticking to the good ol USA, there are the complaints of people (like ol George Fitzhugh) who said that most Americans were "wage slaves" and that it was even worse than chattel slavery. After all, he argued, the slave master has to feed and clothe his slave; the working American has to pay for those himself. (Maybe the perceptive will recognize this line of thought, even today).
It would be accurate to say that, even if you're royalty, we are all the descendants of slaves. Okay, but that's just trivializing the term. Yeah, I'm a slave to my girlfriend or mother; I do what they say. Oh, woe is me. As for real slavery today, it's all around. it's in Saudi Arabia, Morocco, Mauritania; and I mean that people are bought and sold to work. There's also the sex trade, which imo is the oldest form of slavery in existence --but the one that men are least interested in ending. Otoh, families are sometimes forced into selling their daughters --just like in jolly ol England long ago (see Jane Eyre, Clarissa, etc)-- without knowing exactly what will happen to them.
But, for me to sit here in front of two computers, with 2 monitors, and 2 tvs and a full refrigerator and call myself a slave is something I wouldn't dare to do. Yes, I'm a sheeple under the thumb of an oppressor. But, I don't got debt; and I'm free to pick up my check on Thursday. I think there are a lot of people who'd love to be enslaved the way we are.
"A man is rich when he has time and freewill. How he chooses to invest both will determine the return on his investment."