Do you think political instability is the major course or something else?
Yes, it is.
One tactical way that the government has successively used in causing modern day slavery is through poverty. They fail to do the needful, thereby leading people to hunger and suffering, which gives them more power to manipulate them. People who are hungry are very easy to convince, or should i say 'deceive'. This is why i don't get surprised when i come across certain replies on BTT that advices people to get more than one sustainable income.
From my observation, this problem is very common(both in developed and undeveloped countries). Corruption just seems to be a disease that always finds a way to affect every country. There is literally no single country that we can single out of being 100% fair and transparent. It just feels that corruption and government are two things that must work in hand, though some countries are far way worst than others.