I was wondering the same thing? Why couldn't another company just make a generic and sell it if there is such a high demand.
The other concern emerging economies like China have is they are already developing their own brand name/patented drugs. If they don't respect the US/EU patents, they can't really complain when the US/EU doesn't respect theirs. The US market makes up almost 2/3 of the western drug market, so it would be a huge lose for China.