Article Three of the United States Constitution
This meant that the judges could not be independent or impartial.  If they made a decision that King George did not like, they could be fired, or not paid.  Judges who wanted to keep their jobs made decisions based on what King George would want, not based on what the law said.  If judges are cannot be independent, or do not follow they law, courts are not fair, and there is no way for regular people to get justice.