The Targum Pseudo-Jonathan translates Jethro's criteria for judges into four clear qualifications: "Thou shouldst elect from all the people men of ability who fear the Lord, upright men who hate to receive the mammon of dishonesty, and superappoint them to be heads of thousands, of hundreds, of fifties, and of tens" (Exodus 18:21).
The Aramaic phrase "mammon of dishonesty" — mamon d'shikra — is striking. Jethro does not merely demand that judges refuse bribes. He demands that they hate them. Not tolerate the temptation and resist. Hate. The distinction matters: a judge who resists bribes but finds them flattering will eventually accept one. A judge who hates them is structurally incorruptible.
The four criteria stack: men of ability (competence), who fear the Lord (piety), upright men (personal integrity), who hate dishonest gain (incorruptibility). Any one alone is insufficient. The combination is what creates a trustworthy court.
The numerical hierarchy — thousands, hundreds, fifties, tens — creates a system where no case is more than one or two levels from a judge. The Talmud in Sanhedrin 18a takes this seriously as the prototype of the later Sanhedrin structure: small courts everywhere, larger courts above them, a supreme court at the top.
The takeaway: the quality of a society's justice depends less on its laws than on the character of the people appointed to interpret them. Judges who hate dishonest gain are the rarest and most precious infrastructure a people can build.