Though it seems that these appointments, were of a civil and political kind, and therefore make a digression from what went before, yet they serve to show the gracious attention of GOD toward his people. Romans 13:1.
Related Commentaries of Deuteronomy 16:18
Deuteronomy 16:18-20
18 Judges and officers shalt thou make thee in all thy gates, which the LORD thy God giveth thee, throughout thy tribes: and they shall judge the people with just judgment.
19 Thou shalt not wrest judgment; thou shalt not respect persons, neither take a gift: for a gift doth blind the eyes of the wise, and pervert the wordsd of the righteous.
20 That which is altogether just shalt thou follow, that thou mayest live, and inherit the land which the LORD thy God giveth thee.