That's the voluntary part. Voluntarily choosing to go back, when an entire family may depend on the income, is not that voluntary. The indentured part is the

That's the voluntary part. Voluntarily choosing to go back, when an entire family may depend on the income, is not that voluntary. The indentured part is the extended commitment to a single employer, enforced by law, with clocks running all the time on the various phases. The servitude part is the threat of deportation that hangs over the person if they dare to question workloads or treatment. Most places don't make this obvious, but they don't have to - it is an iron fist in a velvet glove.