The core of their mission is making people in responsibility unaccountable. Some government will pay McKinsey to advise them on some brain-dead policy, and when

The core of their mission is making people in responsibility unaccountable. Some government will pay McKinsey to advise them on some brain-dead policy, and when the policy inevitably fails they can say "we consulted the experts and followed their advice", doubled with "every other government followed the same expert advice". Typical "nobody was ever fired for buying IBM / Microsoft" mindset.