The world's resources that people depend on for a livable life (food, clean water, land & housing, arable land, fertilizer, doctors, unpolluted air, fuel, energy, etc) ARE a fixed pie at any given time, you numbnuts. You can't make more of those at will the way you duplicate SW or print fiat.
I feel sneaking in "at any given time" makes the fixed vs growable pie distinction pretty much meaningless; even printing fiat takes some time. At a certain time there's a certain number of doctors (and everything else), but the number of doctors in a country can obviously increase over time, including by immigration.
