true that the size of the pie is not fixed; it grows at a certain rate
when the pie grows faster than the population, wages rise and job availability increases; when the population grows faster, wages stagnate
bad monetary policy exacerbates this but that's another discussion, though it's important to note that the economic growth of the past decade is unsustainable and driven by dovish monetary policy; a bubble, if you will, and the real state of affairs will be ugly when it catches up with us
there is absolutely room for immigration but any policy that does not factor its relationship with wages into the equation is not approaching policy from an economically pragmatic standpoint
Do you have any evidence that actually conclusively demonstrates immigration having had a depressive impact on average US wages at any point in US history?