I can't feel sorry for you that things are expensive where you live, because you live in what most of the world considers the middle of nowhere. You pay the price for your remoteness and small population. I'm sure it sucks, but you're not being ripped off.
As for the higher price in Finland, well, I'd kill to be paid to go to school. So, take that as you will. Europeans pay more because they have higher taxes, multiple languages, complex mutlinational laws and such for the game companies to overcome before they can break into what as traditionally been a weaker market than Japan. It's getting better for the companies over there, but it's still a massive pain to operate in Europe and for all that it's still less profitable than the US.
South America, well, most people are just going to pirate the games no matter what the cost is anyway, so they may as well price in a way that makes them money, right? Why sell a game for $40 when piracy will not decrease because of it and sales won't increase dramatically.
You do not have the right to never be offended.
