&gt; So bringing someone across those borders while an unemployed person is within them is a net economic negative.<p>You&#x27;re right - that&#x27;s a vast oversimplification.  Here&#x27;s one of my own: at the same time Linus Torvalds moved to the US, there were a number of unemployed people.  I still think it was a net win to let him in, though.<p>Be very wary of the lump of labor fallacy, it&#x27;s what&#x27;s behind the &quot;they took rrrr jawbs&quot; mentality.