A group of experts decide there are too many people taking up too many resources so they advocate killing a segment (babies, retarded, old people, unemployed, according to some logic-based formula) would be best for the whole.
How is this reasoning less rational than what you advocate?
Bizarre. You think that killing people is rational.. - Because some fanatical 'experts' claim of rationality.
Catch 22.
You have to be as crazy as they are, to believe them to be rational.