This is the part I've never understood. I can see why they don't want to make it half the price (though this works just fine for discount airlines), but MORE? WTF?
Interestingly in Russia it's nothing like that. Round-ticket costs only slightly less than twice the price of a one way ticket (seems logical). Not sure, if this is good or bad, because I really don't understand the underlying logic behind this pricing policy of making one-way ticket twice as expensive as a one-way ticket.