Australia will completely widen the gap with later generations in the region, having a solid foundation to become a strong country just in the Australian region alone.
It is not an exaggeration to say that Australia, which has developed the Darling River and Mure River basin areas, already has the guarantee to accommodate up to 100 million or even 200 million people.
With the addition of lands such as New Zealand and New Guinea, it is not a problem for Australasia to healthily accommodate over 300 million people.
Keep in mind, this is healthy accommodation. If resources are not taken into account, more than 500 million people can be accommodated without a problem, but the quantity of resources per capita will be significantly reduced.
However, it has to be said that it will take a century of accumulation and development for an immigrant country like Australasia to have a population in the hundreds of millions.