While I respect Dick Smith’s views on limiting population growth in Australia, I disagree.
He compares Australia to the USA with a similar size land mass and points out that the USA doesn’t have a higher standard of living or a better medical care for its whole population. I believe that’s due to their political system rather than their population level.
Australia has large unpopulated regions. These include deserts, but such areas have been developed in other parts of the world, including the middle east and USA. This could happen if there was a population to justify the development. Incentives to develop regions outside the capital cities could be initiated. Both the regions and the capital cities would benefit from such incentives.
It’s shortsighted to believe Australia can continue to have a low population in a growing world.