Strong security might allow high median income in the nations that limit population, but that would not assure the global median remained high.
Strong security by itself may not be enough to ensure a high global median income, but strong security plus some other effect which causes a large majority of nations to adopt population controls, would. (Without strong security, every nation would have to agree to adopt population controls, which is much less likely.)
Strong security by itself may not be enough to ensure a high global median income, but strong security plus some other effect which causes a large majority of nations to adopt population controls, would. (Without strong security, every nation would have to agree to adopt population controls, which is much less likely.)