A modern English word or phrase that basically would mean "slave"?

I am considering a dystopian sci-fi setting where the most of the people are basically, government slaves.

So I am looking for a good modern-sounding term for them that would not sound archaic, medieval, and would not imply them being privately owned, criminals or incarcerated.

So far I considered the following:

• Bio-equipment (sounds too harsh and de-humanizing)
• Mobilized worker and conscriptee (both imply temporary nature of the status, which I do not want)
• Element of order (again, de-humanizing)

Can anyone suggest other variants, that basically would mean a worker without rights?

So, basically, a word for a worker without rights but not owned by anyone.

This will probably result in downvotes, but I'll give it a shot. How about proletarian? As per M-W, a proletarian is a member of the proletariat, defined as follows:

proletariat: the laboring class, especially the class of industrial workers who lack their own means of production and hence sell their labor to live

I wouldn't call this a "modern English word", but it does meet your other requirements and could work in a sci-fi setting. At least it's not a made-up word.