This is obviously an extreme case of modern slavery but I think some people might be surprised how many similarities there are between this and working conditions in some places that are perfectly legal.
My company used to do some work for a chain of luxury hotels, we're talking £400 and up a night. The hotels were properly in the middle of nowhere and inaccessible by public transports. The minimum wage positions, service, cleaning etc, were pretty much exclusively Eastern Europeans. They lived on site, for which a deduction was made from their minimum wage pay, in appalling conditions - it was so bad that eventually I refused to do any work there as I felt there was a health risk. Their meals were leftovers from the hotel restaurants as there were provided with no cooking facilities, again a deduction made from their pay. Their hours were all over the place, as they were permanently on site it was basically work on demand for as little as an hour at a time as required but that could be any time of the day or night.
And people wonder why we're having issues filling those sort of positions now. If anyone on here went to drop one of their kids off to work at somewhere like that you'd have them straight back in the car and out of there as quickly as possible.