You're not looking at the big picture. It's not like this is an isolated incident, those price inconsistencies apply to a LOT of games and probably the majority of other things.
You can't look at a direct currency conversion and say that you're getting screwed because it's not as simple as that and those figures are pretty much meaningless without taking various other
things into consideration.
For starters the price you see is not the price you actually pay, thanks to the fact that in the US the shelf prices don't include tax. That $150 for the Skyrim CE will be more like $160-165 depending on what state you're in. On top of that extra taxes can be added for items like prepared food, medication and clothes.
The other really important thing is that the minimum wage in the US is considerably lower than elsewhere and there is no law that employees must get any benefits like paid leave or the right to a fair dismissal.
Imagine two very similar people, both working minimum wage jobs at McDonalds, one in the USA and one in the UK. Say they both work 40 hours a week and want to go buy the limited Skyrim. We'll assume they're both over 21 because working out the minimum wage for people under 21 gets a lot more complicated.
The guy in the USA earns a total of $346.80 (using the minimum wage of $8.67 per hour from Washington state, the highest in the country) and pays $164.25 for the game with the 9.5% tax. This works out as 47.3% of his gross wages.
The guy in the UK earns £237.20 (£5.93 per hour) and pays £129.99 for the game, which works out as 54.8% of his gross wages.
So it's really not that much of a difference and that's using a state with a high minimum wage and average tax. It could be worse, if he was from Arizona the minumum wage would only be 7.35% and the tax would be 10.6%.
The guy from the UK would also probably get 4-5 weeks of paid holiday leave per year as well as maybe up to a month paid sick leave and up to 6 months paid maternity leave if he was a chick. He also couldn't be fired without good reason or being paid a large amount of redundancy pay. As far as I'm aware the Americans aren't guaranteed any of these things, in the UK the law says that all employees have to have them.
Think about it next time before you bitch about how great the Americans have it.