Over the past seven decades, seven million people - including me actually - have migrated to Australia.
On the present trajectory there would be another 13 million immigrants between now and 2060.
Australia wants young, skilled migrants, ideally predominantly English speakers, to help deliver a demographic dividend:
"Younger and more skilled immigrants are best placed to make a positive economic contribution to Australia.
These types of immigrants provide a demographic dividend by increasing the proportion of people in the workforce, thus reducing the negative impacts associated with an ageing population.
Skilled immigrants are also more likely to generate spillover benefits through enhanced productivity, innovation, and greater flexibility to move to other occupations in response to changing labour markets."
The 'right' level of immigration
"Assuming that net overseas migration (NOM) continues at the long-term historical annual average rate of 0.6 per cent of the population, the Australian population is projected to grow to 40 million by 2060 — some 13 million larger in 2060 compared to natural increase alone."
It was interesting to note that the PC's modelling showed that real GDP growth (and growth per person) would be higher under its accelerated immigration scenario, suggesting that Australia might adopt a faster immigration programme over the next four decades.
It seems unlikely that a deliberately lower immigration programme than the "business-as-usual" case would be adopted, though.
That's partly because an organism that isn't growing is...dying. Moreover, immigrants are on average young workers, helping to slow down the ageing of Australia's population.
The PC Report found that migrant trends are changing, with most immigrants heading to the largest capital cities, and most immigrants now hailing from Asia. There are more people in Australia today that were born in China and India than there are people like me (i.e. born in England).