Whether you believe in a bigger, the same or a larger population shouldn't the immediate action be for Australia to have a population policy with an explicit ideal number based on current technology.
A farmer who kept trucking in more sheep without any idea of the carrying capacity of his farm would obviously be a drongo.
Both Liberals and Labor have no population policy, its too hot for them even to talk about because they are affraid of being called racist.
This issue is too big for either political party to manage and should be the subject of a Royal Commission.