What I find amusing about this is that it is roughly equivalent to saying that the United States needs to conquer new territory to survive. Need to bring more people under our thumb.
This is definitely "dying empire" thinking.
Worth saying that I do not agree with this. I think in many ways our cardinal sin is that in the interest of legibility (especially for tax purposes) we've regulated our ability to employee people and to get work to an absolutely insane degree. To such a degree in fact, that much of our economy relies on having a source of "black market" labor and indentured servitude in the guise of immigration.
Where we flirt with danger is that we look at one side of this equation, the immigration side, but not the other, the labor side.