Not even worth the cost of the bandwidth to discuss.
The chances of Congress enacting a statute authorizing DOT to issue such a rule was hovering at close to zero before Covid-19. Now, it might be at zeroes out to the 4th or 5th decimal point.
Not only a poor idea in the first place, but US businesses won't support it as that welfare compensation is paid through higher fares and there aren't a lot of businesses looking to pay that right now.