Solomon
Proverbs 28:16ESV·traditional attribution

A ruler who lacks understanding is a cruel oppressor, but he who hates unjust gain will prolong his days.

Matthew Henry Presbyterian @wholebiblehenry

Two things are here intimated to be the causes of the mal-administration of princes: - 1. The love of money, that root of all evil; for hating covetousness here stands opposed to oppression, according to Moses's character of good magistrates, men fearing God and hating covetousness (Exo 18:21), not only not being covetous, but hating it, and shaking the hands from the holding of bribes.

John Gill Reformed Baptist @doctorgill

The prince that wanteth understanding is also a great oppressor,.... Or, "much in oppressions" (o); he multiplies them, and abounds in them; he distresses his subjects in a variety of ways and methods he uses to extort money from them by which he shows his want of understanding: he is a wise prince that uses gentle methods, and gains the affections of his people, and...

Jamieson-Fausset-Brown Reformed @jfbcommentary

The prince . . . understanding--that is, He does not perceive that oppression jeopards his success. Covetousness often produces oppression, hence the contrast.