Probably not, but nor could any variation of current western diets, vegan or omnivorous. Wheat simply is not suited for the vast majority of the Australian continent. In a fantasy land where private property is abolished and so is for profit farming and the entire concept of Suburbia (fuck America for inventing this, btw), I would say even high intensity food production would not be able to meet the needs of modern Australia, let alone a future one. It's simply too dry to sustain a western diet as the sole caloric intake. There are many indigenous plants not being utilized by the European inspired diet. Certainly bush tucker is much more suited for the environment than anything else currently available, but good luck trying to persuade Anglos at large into that.

On top of that, there are vast swathes of western NSW and west-ish Queensland (i.e. not desert) that could possibly support grass and therefore grazing animals but not intense farming. Every square centimeter of land must be utilized as efficiently as possible if humanity hopes to survive without destroying the planet and/or having a bunch of poor people die. However this is a dream not likely to be realized. There are profitable cotton farms that must be protected by local/state governments, you see. Water must be first diverted to the rich before the commoners. At least on a local level, I see cotton farmers being lumped in with "the farmers" as if their production is actually as necessary as food. Propaganda for saving these water intensive crops because they're supposedly 'salt of the earth farmers just trying to make a living' when in fact they're underpaying overseas workers for a visa to continue to grow their non-indigenous crop and siphoning water from already struggling people is disgusting and yet again we find the long arm of capitalism impeding the needs of the people.

or idk im kinda drunk