Fair tax is anything but fair. Disproportionately punishing those that are not wealthy. People must consume to survive. Taxing that would only impact their ability to survive in the long run. Conversely the wealthy get wealthy by stealing more than they consume. Making a flat 20% tax on their consumption useless. As the amount of their theft consistently increases. Our ability to recover it decreases.
A recurring 20% tax on wealth might be workable. But that isn’t what the so called fair tax has ever been about. There should be no minimum wage anywhere in the world. There absolutely however should be tightly controlled maximum wages and compensation. After which things are taxed at 100%.