Because the better an organization is at fulfilling its purpose, the more it attracts people who see the organization as an opportunity to advance themselves.
Organized religion provides a model of the way all organizations, from the state down to the village garden club, end a price in terms of a member's freedom of thought and action.
This whole phenomenon of the diversion of organizations from their purposes and ideals does not seem very serious when the scum rise to the top in the bridge club or the offices of a small magazine publisher.
The ability to get ahead in an organization is simply another talent, like the ability to play chess, paint pictures, do coronary bypass operations or pick pockets.
That the more authoritarian organizations survive and prevail goes generally unnoticed because people focus on the objectives of organizations, which are many and varied, rather than on their structures, which lend to be similar.