This is definitely true. I'm always shocked by how much relatives over there pay. However, outside the Asian markets, Australia is a bit off the major trade routes to the rest of the world, so general product prices never surprise me much these days. Bandwidth costs too, although I think having a much lower population density also helps drive up those prices (sadly).
In your case, even with the exchange rate as it is, price parity would be ~$80. If the taxes are ~$10 as you suggested, that means you're paying another what? $10 for essentially the same service? In a way, I'm surprised it's "only" that much more, but it's still terrible for Australian consumers.
sounded good, and got depressed from the Australia Tax. US$59, but AU$100.
AU$100 - $10 = $90 (ish) as taxes are built into our prices, not added later
90 Australian play dollars = 69 American real dollars
US$69 - $59 US price = Australia Tax of ~US$10, approx 16%.