You can justify everything with words "it's just business".
European Union countries share one market and price - the price is the same in Estonia with average salary of 832,57 euros and a Germany with 2155,2 euros.
If they want to reduce piracy, make the game's pricing depend on a average salary in a county, of-course more % of gamers will be pirates in Estonia then in Germany.
At-least make it so for digital games, because now for whatever reason a digitally distributed game cost the same as the physical game.
In Russia for example the majority of PC games cost about half of European price and it helped to reduce piracy, game publishers are making more money with cheaper games.
The same thing happened with WoW in China, the subscription fee their is less then Europe's/US's and Blizzard still made a ton of money.