Ceteris paribus allowing anyone in the world to take a job if the employer wants them leads to better outcomes on average. That includes the situation where Ame

Ceteris paribus allowing anyone in the world to take a job if the employer wants them leads to better outcomes on average. That includes the situation where America is paying for global protection and other special negotiated treaties. Even if you wanted to specially protect American workers, it would still be more beneficial to allow anyone to take the job then use the excess GDP to make up for the lost wages of Americans. The estimate by Borjas (the most anti-immigrant economist) is that wages would drop at most 5% (IIRC) if open borders happened.