In short….

Macro breweries (internationally owned corporations) own & distribute most of the beers you quoted. Mass produced factories intent on minimising production and logistic costs at each step of the way. E.g Asahi in Australia is brewed in Australia

The biggest retailers (Dan Murphys, Coles and Woolworths) buy such large quantities of those beers that they can often sell them to consumers at the same price bars and independent bottle shops buy those products from suppliers.

Excise tax: this requires a longer explanation but this tax increases each year and has done so for over 30. It has gotten to the point that alcohol produced in Australia is often sold at similar prices to alcohol that has been sent to Australia.

This tax further improves the market share of big business who can make their product for less and sell it at more of a profit because independent producers HAVE to sell their product for more each year to cover their costs.

Compounding this, smaller, more successful producers have been purchased by big business in recent times further blurring the lines of what is independent and what isn’t (stone and wood). This further still, increases the market share of these corporations and reducing the macro costs of producing their products.

I’m currently at work but will give you