Not to flog this point to death, but…
I have had a couple of e-mails from professional economists arguing the open
borders case. They both seemed perfectly reasonable and logical, taken
simply as a matter of economic theory. (About which, let me confess, I am
blankly ignorant.)
Yet look. The only Third World country I know at all well is China. I can
offer the following well-informed estimate: The proportion of Chinese people
who would come to live in the USA under an open borders policy would be in
the range 2 to 5 percent. That is 24 to 60 million people, from a single
country, in just a very few years.
Are the open-borders people really OK with that? Really?