> Slaves are property of others (until their death or a decision by their owner to free them)
That is chattel slavery. There are other forms of slavery, indentured servitude being one of them. De facto slavery is the term of art for what is going on here.
The term of art that I'm familiar with is "unfree labor" or "modern slavery", both of which are widely used. Either way, every country has agreed it's at least nominally a human rights issue via the Forced Labor Convention ratified by all diplomatically significant nations except the US.
