Prius and Volt drivers aren’t paying their fair share of gas tax - with a mileage tax everyone who creates even a portion of glowball warming will be taxed at the same rate - no matter what their footprint - because they will be taxed per footprint - not the weight of the footprint.
See how easy it is.....;>)
‘A Bureaucratic Mind is a Terrible thing......’
Maybe another reason why they are floating this is to test people’s reaction to this and find ways how the government can counter act it....