There is an evil that I have seen under the sun, as it were an error proceeding from the ruler:
The scope of these verses is to keep subjects loyal and dutiful to the government. In Solomon's reign the people were very rich, and lived in prosperity, which perhaps made them proud and petulant, and when the taxes were high, though they had enough to pay them with, it is probable that many conducted themselves insolently towards the government and threatened to rebel.
Commenting on Ecclesiastes 10:4-11
There is an evil which I have seen under the sun,.... Which Solomon had observed in the course of his life, practised in some kingdoms and by some princes on earth, under the sun; for there is nothing of the like kind, as after mentioned, done in heaven, above the sun; as an error which proceedeth from the ruler; from the supreme ruler of a...
as--rather, "by reason of an error" [MAURER and HOLDEN].