I'm sorry, I hated this one with a burning and steadily intensifying passion. The worldbuilding was tendentious and unconvincing, the characters were contrived, the central mechanism bore no inspection at all (an easily defeated immortality system has not previously been defeated; people accept an absurd totalitarian government that amounts to the author's joke about sociology; and an apparent immortality disease that prevents children from reaching adult maturity, prevents adults from procreating, and is imposed upon the unwilling is somehow accepted), the humor so appreciated by SpareInch fell completely flat for me, every time, to the point of annoying rather than amusing, and the eventual reveal of the villain managed both to be obvious and to make precisely no sense (you can skydive sans parachute and walk away, but a modestly sized robot can suck all the blood out of your body with lethal effect through a needle designed to take a tiny sip? Ever tried to drink a few pints throw a narrow straw?). And no-one has previously discovered the anti-immortality effects of exsanguination, or perhaps decapitation?
Everything about this story struck me as the author trying to be clever, in a very self-congratulatory manner. Trying, and failing. They desperately needed a jaundiced eye from a reader/editor.
On the other hand, the reading was very well done.