The richest 5% alone is simplistic but in the right alley. Anyone benefits a war, shall pay a chunk in a healthy society. Big one, considering the harm and risk on the society, regardless of the side in the armed conflict.

The trouble usually is, that the 95% has a huge portion willing to sacrifice anyone else in the same society they live on for peanuts dropped to them by the 5%! : / (see the Trump effect as a light example) Parasites are everywhere, being rich or poor, they suck out the blood of fellow people.

The share of ignorants (does not move a muscle in any direction) are even bigger than the peanut lovers so a healthy society is a fairytale. The economically stronger eat up the weak still.