Ill state it again since you apparently didnt read the first time. Poor countries get the games cheap because they're poor. You're not in a poor country so you shouldn't have the same price as them. No one is getting ripped off you just have jealousy.
But some countries are in no way possible able to pay for games the same price as us. This is why they have the lower priced games. Yea the pricing for UK and AUS is ridiculously stupid but that doesn't mean you should pay half price like other countries.
In what way is a game company ripping you off? Also I know this is for gifting games. There's sellers who buy the game as gifts in their country and trade the low priced game to buyers in other countries, so if valve wanted to stop it why wouldn't they stop the trading? Though I do see the problem of people who have friends in other countries and want to trade between them.I agree with this