I fully understand the economic reasoning. My take on it, however, is that they then have absolutely no right to complain when people use the economic reasoning "buy at the cheapest price" and obtain stuff overseas, given that they are knowingly charging us a high price to subsidise an overseas market.
The sad part is that not only are the companies in question ripping off the very customers that developed their business (i.e. "locals"), they are also putting money in the pockets of overseas companies - they sell cheaply to a US retailer, who charges a mark-up and sells back to an Aussie consumer!!
If they sold to Aussies at the price they sell to those US retailers, or even slightly more, the money would stay in Australia, they'd make more and we wouldn't have to ship products three times around the planet back to where they started. Crazy!

