Public radio's Marketplace and the investigative news site ProPublica have looked into the temporary immigrant labor force in the U.S. 

What they found is that somewhere between the temp agencies that book the workers and the factories that employ them, immigrant workers fall prey to a group of middle men called 'raiteros.' Among other things these raiteros often fleece paychecks and charge onerous fees for services, like transportation, that these workers have no chose but to use.

Jeff Tyler from Marketplace and Mike Grabell from ProPublica join the show with more.