The classical argument in favor of free immigration runs as follows .. the produced output will increase over-proportionally, and real incomes will actually rise ..
As it is stated, the above argument in favor of free immigration is irrefutable and correct. It would be foolish to attack it, just as it would be foolish to deny that free trade leads to higher living standards than does protectionism.
In an anarcho-capitalist society there is no government and, accordingly, no clear-cut distinction between inlanders (domestic citizens) and foreigners. This distinction comes into existence only with the establishment of a government, i.e., an institution which possesses a territorial monopoly of aggression (taxation). The territory over which a government’s taxing power extends becomes “inland,” and everyone residing outside of this territory becomes a foreigner.
Moreover, with the establishment of a government and state borders, immigration takes on an entirely new meaning. Immigration becomes immigration by foreigners across state borders, and the decision as to whether or not a person should be admitted no longer rests with private property owners or associations of such owners but with the government as the ultimate sovereign of all domestic residents and the ultimate super-owner of all their properties. Now, if the government excludes a person while even one domestic resident wants to admit this very person onto his property, the result is forced exclusion (a phenomenon that does not exist under private property anarchism). Furthermore, if the government admits a person while there is not even one domestic resident who wants to have this person on his property, the result is forced integration (also non-existent under private property anarchism).
.. The current situation in the United States and in Western Europe has nothing whatsoever to do with “free” immigration. It is forced integration, plain and simple, and forced integration is the predictable outcome of democratic – one-man-one-vote – rule. Abolishing forced integration requires a de-democratization of society, and ultimately the abolition of democracy .. The means to achieve this goal are decentralization and secession (both inherently un-democratic, and un-majoritarian).