Did you miss the part where they are deceived into taking the jobs and prevented from leaving?

> They often end up in the Persian Gulf after responding to deceptive and misleading advertising in their home countries, causing them to either pay large sums or to borrow such sums from employment agents to secure employment in the Gulf and to pay for their transportation, housing and food. When they arrive, they learn that, based on the value of their wage in real terms, it will be nearly impossible to pay off any debt they have incurred or replenish the sums they have expended. This encourages their employers to withhold, delay or simply not pay wages, coercing the workers to remain on the job, sometimes for a lifetime.