This article is from the Libertarian FAQ, by Joe Dehn email@example.com, Robert Bickford rab.AT.daft.com, Mike Huben firstname.lastname@example.org and Advocates for Self-Government http://www.self-gov.org/ with numerous contributions by others.
People have the right to travel anywhere, and to take any job offered
them, so long as they do it at their own expense and without violating
the rights of others.
A way to help the poor is to let them go where the work is, regardless
of borders. Studies show that immigrants don't take jobs from others,
they add to the economy and help create more jobs.
America was built by immigrants who came here seeking nothing but
opportunity and freedom -- and created the greatest, most productive
Respect for human rights and compassion for the world's poor require
that we relax immigration restrictions. 
 "The Liberator," Spring 1992, pp. 18-19, Advocates for Self-
Government, 3955 Pleasantdale Road, No. 106-A, Atlanta, GA 30340,