Political Visas, laborer visas, here are the Truth.
According to the U.S.Goverment Embassy in Pakistan there are no recruitment programs or agents from the U.S.Goverment. People must be cautious about rumors and advertisements promoting U.S. immigration schemes. Temporary employment of specialty workers, usually requiring the equivalent of 16 years of education, also requires a U.S. company to file a petition (Form I-129) with the CIS in the United States.
It is common practice, the U.S employer pay most of the charges including recruitment and immigration for the skilled specialty workers, managers and executives. As the U.S.Goverment does not recruit laborers, people must be cautious for paying money for registration or immigration processing.
In some part of Pakistan, rumors about "political" visas in NWFP and "laborer" visas in the Punjab are false and have been spread by unauthorized "agents" who are profiting off of the poor of Pakistan. The Embassy of the United States in Pakistan reserves the right of handing over anyone caught presenting false documents as part of a visa application to local authorities.
So don't pay money for any person or a company for visas, it should be paid to the Embassy personally by yourself only.