Fable of the Dragon-Tyrant

Allegorical story that uses a dragon-tyrant as a stand in for death, to explore the implications of life extension/immortality technology. The author invents a world ruled by a dragon-tyrant, where the citizens of the world must send regular human sacrifice to the dragon every year. The citizens pick the oldest people among them to die, and establish a bureaucracy around the dragon. At the end of the story, they figure out how to kill the dragon.

Some points/arguments made by the story: