"when a country allows some of the highest levels of legal immigration in the world, twice as much as the United States did in its most immigrant-friendly era, it seems reasonable for people to ask: How much is too much?
And beyond the social strain, there is the economy to think about: As Australia’s population grows, the country needs exponentially more and more immigrants in order to continue to reap the same economic benefits. As a result, Australia’s heavy reliance on immigration to float the economy and fund government budgets runs the risk of turning into a giant immigration Ponzi scheme. So far, Australia has more or less been able to stretch existing infrastructure to accommodate a much larger population. But sooner or later, things will come to a head. When they do, Australia may experience the world’s first immigration economic crash."
https://foreignpolicy.com/2018/10/03/australia-the-worlds-first-immigration-economy/amp/
