I have long argued that U.S. border policy serves as a human sieve, detaining persons while allowing their labor or wealth to flow. I have written about many other aspects of misguided policy -- and misplaced thinking -- about migration.
provides 16 compelling reasons. I would challenge skeptics to think very seriously about his reason #10: hardened borders serve as a kind of ratchet. The harder it is to get in, the more likely people are to stay once they arrive. His ethical and economic reasons are even more compelling in my view, but #16 points to one of the biggest obstacles: some people make a handsome income from unreasonably limiting the freedoms of the rest of us.