Pharma companies want to make money - they'll charge what the market can bear up to what they're allowed to. Some countries cap this - others don't. In the US the government actually subsidizes medication costs in a graduated manner that allows the price point to be set much higher than a natural market would allow - there are also tools like manufacturer rebates or drug trial cards that can also subsidize the price if you've got more time than money and are willing to jump through the various hoops.