It's not immigration at all. That's complete nonsense. There's plenty of space for all. It's really about changing people's ie. the vast indigenous populations heads about consuming, sensible family sizes and all the rest. It could be done, but that's the exact opposite of what is desired by the System. Unhindered Population Growth = Spending = Economic Growth = More Filtered To The Top Few as the Countryside and any true Society is royally fucked as a means to achieve this.