Qatar though has denied claims of human rights abuse against workers.
The gas-rich emirate is in the process of introducing several labour reforms.
Last year it brought in the Wage Protection System, which ensures workers receive their salary on time.
In October Doha announced it was establishing a panel, with a judge as its head, to oversee labour disputes.
Next month, it is expected to announce the end of its much-criticised “kafala” labour practice, which restricts workers’ ability to change jobs and travel, with a contract system.