There's pretty serious resource management issues involved in a population much larger than what we have now - which is tbh a serious problem worldwide. It's not just about land mass - most of Australia is largely uninhabitable.

1. Space in cities, there's only so much of it. This leads to infrastructure issues - transportation, residential building planning, service delivery.

2. Natural resources. We don't have a great deal of water and desalination plants, while effective, chew unholy amounts of energy, which forces up electricity prices that were already rising. Then there's food and the ever-increasing trade deficit from all the stuff we need to import that people want to buy.

3. Healthcare, education, etc. These things get more complicated and more expensive as the population grows, which puts pressure on the government's budget and its ability to deliver services, particularly in a resource-driven economy.

4. Immigration. It's a fact that there's cultural tension associated with mass immigration. Australia isn't as racist as some would have you believe, but if we let too many people in there will be irrational anger in some sections of the population.

5. Social effects. These are largely unknown, but pretty much everything that happens has an unintended and unexpected social effect. Significantly increased population is one of the strongest.

It's a massively complicated issue that can't be distilled to a few pop-political talking points. Don't think you have it all figured out because I'd bet big that no one does.

The thing is, these problems are not exclusive to Australia. Stopping or slowing progress is not the answer, nor is it a tenable idea. Healthcare and education dont get more complicated. The United States manages education, Canada manages Healthcare with bigger populations than Australia. More immigrants would mean a bigger tax base, by the way~

And point 4 and 5 dont even justify a response, because theyre irrelevant. Every first world nation seems to deal with it just fine, without the "We're full" ignorant backlash that makes Australia look like a bunch of morons.

Sorry to do this, but you can't expect me to take kindly to a vapid response like that. Either do some proper research or shut the fuck up.