tal

That still is not slavery. The person in question is still not compelled to work.

Yeah, sorry, but no. That’s not slavery. If you’re present in the country illegally and working illegally and could be returned home at any time, you may not be making as much as you would if you were present legally, but you are not compelled to work. You can always terminate working and return to the country where you are legally supposed to be. If you choose to be in Country A illegally and working there rather than in Country B legally and working (for less) there, that is your choice, and you are not being compelled to work.

Slavery entails someone being compelled to work.

I remember this story from about twenty years back hitting the news:

https://www.theregister.com/2001/04/12/missing_novell_server_discovered_after/

Missing Novell server discovered after four years

In the kind of tale any aspiring BOFH would be able to dine out on for months, the University of North Carolina has finally located one of its most reliable servers - which nobody had seen for FOUR years.

One of the university’s Novell servers had been doing the business for years and nobody stopped to wonder where it was - until some bright spark realised an audit of the campus network was well overdue.

According to a report by Techweb it was only then that those campus techies realised they couldn’t find the server. Attempts to follow network cabling to find the missing box led to the discovery that maintenance workers had sealed the server behind a wall.