The key to preserving our standard of living in a global economy will be to develop the third worlds rather than to import the third world into America...no small task.
In the interim we do need to keep a completive edge by allowing some lower wage earners to enter, but wiping out borders is not necessary.
No kidding. There are six billion people on this planet, the vast majority of whom live in third-world conditions. You do the math on the impact on U.S. wages.