[alloysteel]

If the intention is to go full Socialist-Communist, at least go at it the right way, according to the two most prominent examples of large countries that have advocated such a command-and-control regime.

If the economic base of the territory once known as the United States of America get knocked down too far, it becomes a squalid Third World country with little immediate potential for exploitation. Hordes of starving and recalcitrant people tend to make occupation of that territory hazardous to the invaders. Consider the example of Afghanistan, truly one of the most blighted lands in all the world. They break empires there.

[Pearls Before Swine]

If the economic base of the territory once known as the United States of America get knocked down too far, it becomes a squalid Third World country with little immediate potential for exploitation. Hordes of starving and recalcitrant people tend to make occupation of that territory hazardous to the invaders.

So, to extend your cynical reasoning, wasteful infrastructure spending and foolish immigration policies are in the long run invasion security policies. Because, who'd want to bother?