With regards to the literal definition of slavery I would argue it is not only restricted to chattel slavery, since that would deny most cases of forced and unfree labour. That someone can control a person, effectively owning them, without a mandate from any government or law is precisely the point. It shows the need for a more democratic approach to work and makes evident a discrepancy within self proclaimed free and democratic societies. That is what I think is the point being made by OP, not to belittle those who live under oppressive dictatorships (which is horrible and often an order of magnitude worse), but to remind those that don’t that for big parts of their lives they are not truly free themselves either.
With regards to the literal definition of slavery I would argue it is not only restricted to chattel slavery, since that would deny most cases of forced and unfree labour. That someone can control a person, effectively owning them, without a mandate from any government or law is precisely the point. It shows the need for a more democratic approach to work and makes evident a discrepancy within self proclaimed free and democratic societies. That is what I think is the point being made by OP, not to belittle those who live under oppressive dictatorships (which is horrible and often an order of magnitude worse), but to remind those that don’t that for big parts of their lives they are not truly free themselves either.