Political instability could be a major reason for modern day slavery. Seeing those people who have been victims of human trafficking, or even forced labor, that only proves that there is nothing good brought into the community about this political instability. And worst is, while the big names in the government are gaining a lot of benefits from it, those poor individuals have even push into extreme poverty. This leads to economic instability, where rich people becomes richer, while the poor ones end up the poorest of them all.
I think that slavery have already existed even before and I think it is much worse before in fact. As for now, there are now politics and I think yeah, it is one of the reasons on why some are poor and being a slave to others for money. I think that even though there is a stability in the political system, crimes like you mentioned there can still occur, though their levels are now minimized. Same goes with the economic instability, it can also occur naturally no matter what but again, its effects and duration are now reduced if there is a stability in the political system.
that only proves that there is nothing good brought into the community about this political instability
Obviously, because that is what its name implies (being unstable) but are you actually expecting something positive about it? That would be weird then if yes.