It's more expensive in China than the US too, even though they're made here? Can't possible be anything to do with regulations and taxes, clearly just Apple trying to get as much money as possible!
Seriously though, this comes up EVERY PRODUCT LAUNCH. It's cheapest in the US because of taxation and other reasons, it's more expensive elsewhere because of taxation and other reasons. The people of the US traditionally don't like taxes (re history), hence these tend to be on the lower side there. They price the things to make roughly the same profit in each area, this causes pricing differences when compared to the main currency (USD). People need to stop comparing it to what it costs in another country and just accept what it costs in theirs, what does it matter if it's cheaper in the US? Are you going to fly there and buy one, then fly back? Are you going to illegally bring it to your home country and avoid paying the import taxes to save the money? All credit if you do this, but just buy the thing and be happy, you could move to the US but be on a lower salary compared to home, then complain it costs too much still. I dunno, ymmv.