But we're talking about the password issuer (e.g. India), right? They have an interest in protecting their citizens and limiting the power of other local governments to abuse them
https://travel.state.gov/content/travel/en/international-tra...
> A valid passport is required for U.S. citizens to enter or exit the Kingdom of Saudi Arabia.
I think it would be better to legally force all these migrants back into their countries every couple of months just to make sure they're not being kept by force. Fighting abuse costs money, it's expensive, I know but Saudis can afford it.