So what we see here is the delegation of responsibility in the administration of the government of God. The government of God? Yes. Notice verse 17, where it says, "The judgment is God's." Even though the men would be doing the actual judging, God is seen, we would say, as being 'in the loop.' He is part of the process.
I also want to interject at this time that He is not insuring the quality of the decision. Rather, this is instruction to the judges to be aware and careful because they are going to have to give account to God for their judgments. It was a way of putting the fear of God into them.
Notice, again, verse 18. Moses said, "And I commanded you at that time. . ." It means that he authoritatively taught them their responsibilities. Moses, then, performed his function in the government by providing guidance in these civil affairs that were, undoubtedly, undergirded by God's spiritual law. So again we see the function of education that God's government is taking.