http://www.economist.com/news/international/21631039-interna...
http://www.economist.com/news/leaders/21631025-learn-ruses-i...
http://www.economist.com/news/international/21631039-interna...
http://www.economist.com/news/leaders/21631025-learn-ruses-i...
Specifically they found that the NGO behind the slavery index had taken some countries where there was no data and simply assumed that country had as much slavery as a similar country (nearby, similar population etc)
Then they ranked countries. And named and shamed.
It was not good statistics.
Simple employer sanctions have proven effective in ending this kind of migration but US gov't imposes almost none.
Heck, even legal professional immigrants (H/L visas) don't have the right to change employers or resign.
If we had credit for all those millions, we'd be at the top of the league table here. Time for a recount. (We're number one.)