I completely agree with Brie, wages over in the US are MUCH lower than over here in Australia, Estee Lauder Companies in Australia still has overheads to pay and wages to pay and i'm sure our country is more expensive to stock MAC than some of the others in the world.
A lot of you are saying how expensive your favourite product is and how you are sick of paying AUS prices, well it is as simple as don't buy it! If you don't want to pay for it, go and buy something cheaper. I love my Creme De La Mer and it is one of my HG products, and hell yes its expensive, but if i really want it, i'll fork out the money. If i don't feel like forking out the money for a face cream, then i wont. Simple as that.