Earlier quoted context omitted.
I interpreted it like this: deaths are less expensive than lost productivity. This might actually hold given the groups that are the most at risk are probably least productive: the old and the infirm.
Sounds like some dystopian eugenics shit to be honest, get rid of those who no longer contribute to society. I for one am working towards my old age, I'd hate to be left to just die.
That word doesn't work when describing people who are no longer part of the reproducing population.