Rehashing old folly

(From this post)

1. Government is incurably evil.

2. People are irredeemably stupid.

Aim of any sound political system is to save people from evil perpetrated by ruler and stupidity perpetrated by themselves, at the same time ensuring progress.
One way a system could succeed is by making both people and rulers believe that they thought of it themselves. It increases their self-esteem.
However too much of self-esteem may be a problem. Therefore a priest class is needed at the top to constantly bring down self-esteem to a manageable level.