It's also interesting to compare the number of slaves in the USA before slavery became illegal, to the number of prisoners in the USA working for almost nothing.
That's right... there's now more slaves in the USA than before it became illegal.
Most prisons in the USA are run by private companies. They get paid by the states to hold the prisoners. Recently there were some judges convicted of sending innocent children to jail in exchange for financial payments from some of these private prisons.
US: 760
Netherlands: 100
http://www.kcl.ac.uk/depsta/law/research/icps/worldbrief/wpb...