Straight from the Source
Yisro joins the Jewish nation and immediately recommends that instead of Moshe administering justice to all the disputes that occur with the people, rather there needs to be a judicial system with many judges to arbitrate all these matters. And he is very strong about his suggestion stating that if Hashem will concur with my idea than you will be successful otherwise the present approach will fail. Didn’t Moshe himself realize the imperfection of the present system and perhaps think that it needed to be revamped?