"You answered me, 'What you propose to do is good.' So I took the leading men of your tribes, wise and respected men, and appointed them to have authority over you - as commanders of thousands, of hundreds, of fifties and of tens and as tribal officials. And I charged your judges at that time, 'Hear the disputes between your people and judge fairly, whether the case is between two Israelites or between an Israelite and a foreigner residing among you. Do not show partiality in judging; hear both small and great alike. Do not be afraid of anyone, for judgment belongs to God. Bring me any case too hard for you, and I will hear it.' And at that time I told you everything you were to do." NIV translation
Moses reminds the people of the fact that he had bowed to their desire for leaders and he had instructed them. This might all seem good but we must remember that Israel was to be different. They were to be led by God Himself and not by a governing body like other nations. The effects of this mistake linger to this day and will continue until Jesus returns for the Millennial Reign.