Indeed. I would be fine with "open borders" as long as every subsidy and welfare program is eliminated. It is unfair for people to have free stuff from the local government just because they happen to have been born there.
Sure zajd, sounds great. The US should make a welfare /subsidy rule for the entire world. Since lots of backwards reactionaries will resist it will likely take force and war to annex unruly lands and enforce this law. Let's call the program COMINTERN for old time's sake.
It's almost as if "fairness" isn't something we should be concerned about when it comes to immigration. Almost as if... people don't have that much control over their government and should probably be treated as individuals as opposed to a "immigrant from X"