This is also part of the problem. Apple adjusts prices in markets when the currency exchange rate has maintained a level for a certain period of time. They don't change it constantly. The Aussie dollar has been getting stronger and stronger against the $US, and Apple has adjusted over time, but they don't do it daily, weekly or even monthly.
If they were to lower prices only to have the Aussie dollar weaken significantly, all of a sudden they would be losing margin and be forced to raise prices, something everyone hates.
True up to a point. Exchange rates are not the first determinant of pricing, except maybe for commodity items that do have world pricing. Local markets are the primary factor, i.e. what stuff sells for in that market. Manufacturers based in countries with weak currencies are going to have a pricing advantage selling into countries with strong currencies, but they are going to use that advantage only sparingly to maintain or gain some market share. Their primary goal is maximizing profits, and a weak currency is an excellent opportunity to do that. This puts a lot of pressure on domestic manufacturers coping with strong currencies. Their margins can get squeezed till they squeak, and they tend to complain to their governments. The value of the USD vs. the AUD has dropped by more than 50% over the past 12 years, so we can see why they are griping to their government, and why the pols respond with this showboating exercise. It's really all quite meaningless in the final analysis.