Nothing new. Working for the UAE, Saudis, Kuwait, etc. has always been the same: they take your passport, and/or withhold payment, and/or you need to get your employer give you permission to leave the country.
Unless you’re wealthy enough to hire people to work for you, never ever go to work there.
The KGB became the FSB. Historically:
…and so on.
https://en.m.wikipedia.org/wiki/Vladimir_Putin