I think there are several reasons.
1.) Licensing fees, trade agreements, and higher shipping costs can drive sales prices up.
2.) Prices are actually cheaper for simmers who pay in Euros if you look at the minimum wage of US versus say, Spain. Minimum wage in Spain is E8.84 where as US is $7.25. If you do some math, (for the sake of simplicity, we are not considering taxes) you will find that the U.S. worker has to work 1 hour and 17 mins to make $9.99 whereas the Spanish worker only has to work 1 hr, 7 mins. That means in the long run, some other countries are actually paying less than the U.S. even with the new higher prices. Countries that are not on the Euro or Dollar system (US, Canada, Australia) are not a main source of income, so EA most likely does not care about the affordability to that certain country since it's not a money maker to them, such as Brazil. They make most of their money in Canada, US, and Europe.
3.) Inflation. With recent upheaval with Brexit and various other events, the Euro has been flexing a bit. Last time I was in Europe, a Euro was $0.73 US dollar to every 1 Euro. Now 1 Euro is $0.81
In short, Economics stinks.
