Australians are paying $6.50 for Hearthfire...not $5. Even though we are in a far better financial state than the rest of the western world.
I was simply pointing out that the US games industry is screwing over australian gamers to pay for their nation's piss poor economic management.
Blood and honour...the true folk in the US and western europe will know what I speak of.
Actually, no we're not. You're also definitely smoking some pretty potent crack. Your assessment of the US vs. Aussie trade deficit are completely specious arguments.
More specifically, the price you paid for the Hearthfire expansion--or any US game from any US publisher to be exact--depends on several factors.
The 2 most critical of these factors are the international currency exchange rate and inflation. These two factors are not mutually exclusive. The former changes on a DAILY basis. The latter drives the former, because it indicates the relative rate of inflation between the 2 countries the buyer & seller are located in. The greater the degree of inflation in the sellers country, the higher the currency exchange rate. US based corporations have to account for this phenomenon, regardless of whether they're physically located in that foreign country or do eCommerce. But of course you knew this as an educated Australian consumer who buys US based games right?

Here's a heads up:
As of midnight today, the USD was inflated against the AUD by a ratio of 1 : 98213. So $5 USD = $4.91 AUD.
http://themoneyconverter.com/USD/AUD.aspx
Assuming you Aussies have to pay sales tax like we do, then this inflation and other factors such as trade agreements/tariffs etc. etc. would all contribute to the price hike. I'm not sure what your financial situation is here. But even if you're not old enough to pass the "M" rating requirement for this game, $6.25 isn't exactly a mind blowing sum of money to pay for the expansion content. Especially since it adds significant value in terms of game play hours to your game.

edit: No one held a gun to your head and made you buy this DLC expansion. If the ugly Americans in their big, bold, bad USA are so screwing over you Aussies by our f@cked up economy, then why bother buying our overpriced games? Why not buy from European based software developers or better yet--your own country?