i suppose the real question is why do we allow brutality to continue to exist? and the answer is, we've never calculated the true and real price ~ whatever anybody was paid to commit any atrocities, well, it's always a deceptively well intentioned miscalculation of the true costs... ask the German people, ask the survivors of the holocaust ~ the military pay has already been spent, the stain on humanity lasts generations... in the USA we are still reeling from the ripple effects of the Civil War ~ think about it ~
(one hint of the true cost of brutality is to calculate lost productivity related to Post Traumatic Stress Syndrome --on both sides-- which replicates itself through generations of dysfunctional families.) ...and we do all of this for money?

As the Chinese say, "they pretend to pay us and we pretend to work."