While every existing government mandates discrimination against foreigners, they're wrong to do so. Mandatory discrimination against foreigners is morally no better than mandatory discrimination against blacks, women, Jews, or gays. And economically, it's folly. Mass production is the secret to mass consumption. Trapping most of the world's talent in less-productive regions of the world impoverishes us all. Immigration restrictions are a grave injustice that does great harm, holding much of the world in poverty while keeping the full fruits of human talent off the world market.
Preach it, brother!