It depends what you mean by telephone support. They definitely have offshore call centres, but they also have some really excellent and experienced folks in Australia - it really depends on what sort of support you're after and, to some extent I'm sure, who you are or more so whether you're a corporate client or an individual user. I don't know any specific policies or anything, but that's pretty common.
Support covers a lot of things, including running seminars, roadshows, show stands, presentations, co-sponsorships, education support, Twitter, email, telephone, website, etc etc. There are real people employed here doing that, as well as assisting customers with product decisions, implimentations, intergrations and such. A lot that most photogs would never need and never see, which makes it seem difficult when "all" you want is Photoshop. Of course, if you just need photo processing, they do offer a cheaper alternative in both Elements and Lightroom (as an aside).
The thing with currency movements is that they continue. It seems like the price should be super responsive, but in reality companies set budgets and targets and agree to certain things (like paying salaries) for periods at a time - usually a year but sometimes longer in a cycle. The AUD is now under parity with the USD because fears of a Greek collapse or exit from the Euro are causing investors in Europe to "flight to quality" which means they're shifting their investments to the USD - that increases demand for the USD and increases the price. In Australia, we have some downward pressure from lower interest rates and an expectation that the RBA will continue to reduce official cash rates. Most markets and commentators are locking in another 25 basis points as an absolute certainly by July and many are talking about 50, with an expectation that the banks will pass on around 70-80% of that (which reflects the reality of their funding mix - there will be pressures with European liquidity drying up at the moment).
Anyway, the point is that within the last year and likely within the next year, there's quite some movement of the rate (around 10% from high to low) and you only need to go back to this time in 2010 and it was around 0.87 as the monthly average. There's talk that if China finally loosens its ties to the USD that you could see the AUD seeing much higher prices against the USD as the USD falls (not at all a bad thing for the US economy, but that's another story).
Yes, of course, there's also going to be some "hey we're making more now, awesome" but ultimately they will be tracking their total revenue and deciding whether a change in price will generate more through higher demand (look at the price drop for Lightroom - you have to assume that wasn't done with the intent of reducing revenue or just to make customers feel warm and fuzzy, although that's a nice bonus).
Finally, and this is a real kicker, when was the last time you saw a tech product have a price rise? It does happen, but it's not very common. In other words, once you lower the price, it's lowered. The chances of you ever putting it back up, even if there's a massive movement in the exchange rate, is limited. There are perceptions about price increases that are extraordinarily difficult to overcome. We're so used to tecnology costing us less and less which means either the price has to drop or we have to get a lot more new features for us to accept the value. Even if it maintains the price, it's being eroded by inflation.
Companies like Adobe preventing Amazon from exporting has something to do with ensuring that local markets maintain local revenue, it has to do with support issues, for physical products it can have some legal (warranty related, for example) issues and so on. It also has relationships with other contracts and agreements concerning distribution.
Again, I think it's currently a little over priced, but it's going to take a lot to push it down without have a significant effect on the local operations (which in turn will tend to hurt overall revenue when you don't have local people driving sales - remember, it's not just photogs we're talking about). That said, I think that it will come down if we see Europe settle down (one way or the other), China loosen its currency locks with the USD (and perhaps even push for some role as a replacement global currency) push the USD down considerably and the AUS likely to maintain or even apperciate on the strength of Asian growth.
We are blessed and cursed to perhaps be living in interesting times :-)
