Because work permits are rarely issued to the unskilled, such people generally have no legal way of migrating to find work.

ECONOMIST: Who gets in

The U.S. is the top destination for the world's migrating Christians and Buddhists, as well as those with no particular religious affiliation, including atheists and agnostics, a new study shows.

WSJ: U.S. Top Destination for Christian, Buddhist Immigrants, Study Says