The prospect of vampire re-ensoulment prompts some entertaining thoughts about economic philosophy in this post at the Volokh Conspiracy. Here is a sample:
Why presume that having more humans or human-like beings on the planet is even a problem at all? The ecological concern seems to borrow from the perspective of doomsayers like Paul Ehrlich, who have been beating the population-bomb drum for decades. And for decades, the doomsayers have been proven wrong.
And here is a classic closing sentence:
By establishing a legal market in human blood, as suggested by Enrique Guerra-Pujol in Chapter 12, we could go a long way toward creating an incentive for vampires (especially re-ensouled ones) to eschew violence in favor of remunerative work in the combined vampire-human economy, to the benefit of both the living and the dead.