https://qz.com/1041506/new-data-on-h-1b-visas-show-how-it-outsourcers-are-short-changing-workers/

Hard numbers have been released by the US government agency that screens visas for high-skilled foreign workers, and they are not pretty.

Data made available by the US Citizenship and Immigration Services (USCIS) for the first time show that the widely made complaint about the visa program is true: a small number of IT outsourcing companies get a disproportionately high number of H-1B visas and pay below-average wages to their workers.