The “evil” of Ecclesiastes 10:5 is here specified as that caprice of a king by which an unworthy favorite of low origin is promoted to successive dignities, while a noble person is degraded or neglected.
Related Commentaries of Ecclesiastes 10:6
Ecclesiastes 10:6-7
6 Folly is set in greatc dignity, and the rich sit in low place.
7 I have seen servants upon horses, and princes walking as servants upon the earth.