The (e.g.) Poles have a contract in UK, they can go to court together if the contract is not honoured, they can go home/resign if they don't like it any longer.
According to the various articles, workers from e.g. Manilla are promised reasonable salaries. Upon arrival their passports are confiscated, so they can't leave. They don't have a ticket to go home. They just get a couple of Euro's per day when they arrive, not enough to save for family at home or for a return ticket. It looks pretty different to me.
Same goes for the story of forced prostitution. I assume prostitution is illegal in the UK, making it more difficult to protest for prostitutes. But the weaker people in general get much better protection in the UK then in DXB. The story of the raped kid in DXB facing possible prison is surely/hopefully an incident but also a perfect case to illustrate this.
It is scaring that posters like Tower Ranger sort of condone it by using the argumentation of a 4 year old, that's it is ok, if it happens in other countries. It becomes pathetic the moment you realise that it simply isn't true.