https://www.amnesty.org/en/latest/news/2016/03/Abuse-of-World-Cup-workers-exposed/
Every single gardener and construction worker who spoke to Amnesty International reported abuse of one kind or another, including:
1. squalid and cramped accommodation,
2. paying large fees ($500 to $4,300) to recruiters in their home country to get a job in Qatar,
3. being deceived as to the pay or type of work on offer (all but six of the men had salaries lower than promised when they arrived, sometimes by half),
4. not being paid for several months, creating significant financial and emotional pressures on workers already burdened with heavy debts,
5. employers not giving or renewing residence permits, leaving them at risk of detention and deportation as “absconded” workers,
6. employers confiscating workers passports and not issuing exit permits so they could not leave the country,
7. being threatened for complaining about their conditions.