A seriously creepy thought that I've had (that I certainly don't agree with) -

It could be a way for governments to quickly and affordably "cull the herd" of expensive to support elders, immune compromised, sick, and infirm individuals. In doing so, it would free up capital, resources, housing, jobs, etc. for the younger workforce.

This is of course only a creative musing, not a proposal for an unsubstantiated conspiracy theory.