Michael, I think another part of the "problem" is that Australia is upside down. It takes a huge change to the manufacturing process to keep products right side up when shipping to the land down under. And that adds to the overall cost.
If there are any skeptics who don't believe that Australia is upside down, why do they have upside down maps just for them?
NOTE: Before anyone takes offense, this is just some good-natured humor. Happy Holidays, everyone!