Amazon in Australia is not very good (yet). It's nothing like America or Japan, which have huge inventories and same or next day delivery. This is a really really bad look for Amazon, which is in the process of expanding in Australia. Retailers are already nervous about their expansion plans here and this does further bad for their brand.
I hope they fail here in Aus. Something something tall poppy syndrome. Local retail first.
Then again, as a country, Australia would be free in deciding that it should only be affordable to people who have the means to support their life, to maintain a high quality standard and retails.