This passage discusses the idea that ultimately, the King Messiah will rule over all, as stated in Isaiah 11:1: "And there shall come forth a shoot from the stump of Jesse, and a branch from his roots shall bear fruit." Rabbi Eliezer adds his own insight, stating that wherever there is no justice, there will eventually be justice, and wherever there is justice, there may not necessarily be justice.
This is explained by the concept that when the earthly court fails to bring justice, the Heavenly court will ultimately judge the situation, and God will repay accordingly. However, when there is a functioning earthly court, God does not intervene because the people are responsible for administering justice themselves. This is demonstrated by the verse in Jeremiah 50:7: "For the Lord is a God of justice; blessed are all those who wait for him."
Additionally, Leviticus 26:3 states, "If you walk in my statutes and observe my commandments and do them," implying that God expects humans to uphold justice and follow His laws. If they fail to do so, they will ultimately face the consequences, but if they act justly, they will be blessed with abundance and prosperity. Therefore, it is important to administer justice and act fairly towards all people.