What can the South Korean government do realistically speaking? They have no control over the Taliban prisoners and if I were them, I would never release the Taliban. Releasing them is asking for more kidnappings to take place. I would rather call for a strike in which if all hostages die, unfortunate casualities of war. However I will make sure that I wipe out this group of Taliban and use them as a warning that kidnappings will be met with extreme prejudice.
Exactly Korea can't do anything because the prisoners are under US control. But i do think the US could send a strike force in to rescue the hostages...after all its the least that they should do...in recent years the US has been guilty of demanding help from its allies but refusing to do anything to help them in return...the US really should do something about the situation. Casualities of war is just a conveient excuse for the hostage situation because the US would never let that happen to its people.