There aren't any open positions higher up, and you aren't exactly a top performer. The only way I see you digging out of this is signing up for the Human Initiative Project. A couple injections a week, plus your regular salary, and you'll have more than enough scrip.
Don't believe the rumors, you'll be just fine.
Another interesting contrast to your hypothetical is that in the US people are free to volunteer for paid clinical trials. Yet somehow you imagine the proposed alternative to be entirely malicious...
People are free to leave, if they don't like living in the special economic zone.
And people are able to freely leave them, lol.
This one would be literally run by the UK. I don't think the modern day UK is going to be holding people against their will, in their country. People are able to freely leave the UK, whenever they want.
https://www.thesun.co.uk/news/2917810/elephant-man-drug-test...