We cannot provide enough laws of sufficient perfection to legislate into being a perfectly moral society. Instead, our nation has sought to be a merely moral society, one in which the people can lead quiet, peaceful lives free from tyranny. This concept is not new to the United States. Moses stated his desire that all the people should be prophets, not lawyers.
Morality is largely an objective quality while fairness is an inherently subjective one.
Even if you reject truth as a valid concept, fairness remains inherently subjective. To require the government to establish fairness is to establish a hierarchy of values and of people subject to the whim of the elites. The law becomes arcane, beyond the reach of ordinary citizens like you and me, as it is this very day. I wonder that New Age types are not even more suspicious of government than were the Founding Fathers. Personally, I would prefer to acknowledge that we cannot legislate fairness and then live free from tyranny.