Ahem…attention previous respondents:
Why not use political prisoners? They DO use political prisoners!
The organ donor thing is not big in China. OTOH the organ farming thing has quite a track record. I could tell you more…but I digress.
Instead of Monkeys they might find Pigs a better prospect - similar metabolism and - double bonus - you can eat the leftovers. And a surfeit of production could send the overabundance into a political career - then, when you need to purge, its pork and all the crackle.
Win Win - as they say.
The fact that they’re harvesting organs from prisoners doesn’t change the fact that organs from any human other than their own clones is a problem due to immune system rejection of the replacement organ. Organs from the patient’s own clone, though, can be used without risk of rejection.
That tends to reinforce my dark side speculation, but (sticking with the dark side) consider that Humanzees may not be likely to complain about tainted/contaminated land/water/air or living conditions or corrupt province/city leaders or about the lack of certain freedoms. For those with supreme and state power, people have proven troublesome so far (and potentially explosive).
OK, but I still can’t get past the premise presented in The Island that clones only produce viable donor organs when they’re raised in an environment that provides them with ample Aquafina drinking water, Puma athletic wear and Xbox entertainment consoles.
I mean, these guys are literally human livestock who have no free agency or working knowledge of the outside world. So why waste so much money buying them branded products and filling the clone facility with corporate logos? Can’t they just drink tap water?