A plantation system in which the slaves lack even intrinsic monetary value.
That this is more or less literally true is shown in two ways.
First, you will not infrequently see left wings nuts differentiate Communist slavery from “chattel” slavery. The tacit, and among the less self aware explicit, argument, is that Communist slaves have it better because THEY HAVE NO MONETARY VALUE. You cant buy or sell. One Commissar can just them to do anything he wants one day, and something different the next. The Commissars pocket the profits and can beat, rape and steal from his human cattle with impunity and even praise.
Second, Communists treat their slaves WORSE than slave holders in the United States, Ethiopia, or Niger ever did or would. No matter how inferior racists or tribalists (black people who own other black people from another tribe or ethnic group) considered their human cattle, they still had monetary value, like cattle. You do not beat to death cattle for no reason.
But Communists have OFTEN killed their slaves out of sheer indifference and stupidity. The example burned in my mind is the trainloads of political slaves dumped by Lenin in the woods of Siberia in the middle of winter, with no tools, no shelter, and insufficient winter clothing. Nearly all died, and thise who lived had to engage in cannibalism.
No slave owner would EVER do something that callous and stupid.
And of course the death toll in all is 100 million or more. The KKK in its whole history killed about 4,000 people, most of them after slavery was abolished.
Putting this yet another way, what the Cuban Communists have done to Cuba is vastly worse than what white slave owners did in the antebellum South.
You think of Kunta Kunte always running away. What do you think the Boat People—both those from Cuba and South Vietnam after our ignominious retreat—are? People who would rather DIE—and who often have, as entire families—than live in Cuba.
Slaves were whipped, you say. What do you think they do to dissidents in Cuba? What horrors are not possible in a place filled with torture chambers which would have put a smile on the face of Torquemada?