Lack of education and poverty pushes people into forced labour and slavery according to the International Labour Organisation (ILO).
Kuwait has been urged by an independent UN human rights expert to strengthen measures to prevent the exploitation and abuse of domestic workers.
Many of the foreign workers are trafficked for forced labour.
Only one out of 100 people are rescued from human trafficking according to a senior UN official working on the issue.
Simone Monasebian is head of the United Nations Office on Drugs and Crime (UNODC) in New York.
Forced labour is “like a virus” because of its capacity to mutate, the head of the International Labour Organization (ILO) has said.