"Every gasoline car on the road has a subsidy, and the right way to address that is with a carbon tax. Politicians take the easy path of providing subsidies to electric vehicles, which aren't equal to the applied subsidies of gasoline vehicles. It weakens the economic forcing function to transition to sustainable transport and energy."
The "right way" is to eliminate all the subsidies, then only have taxes based on the known effect on the environment, based on current scientific understanding.
Note that all known energy sources come with some cost to the environment. Gasoline, Diesel, Coal, Solar (from panel manufacturing), Wind (manufacturing), Nuclear, Electric/Battery (Battery rare materials, energy source (Coal, Nuclear, Solar ?). Though I am not sure we would get the answer we think we want.
While we are on subsidies, what about the roads themselves? If we reduced the public money spent on roads, perhaps other forms of transportation could compete (trains, high speed trains, PRT, autonomous-only-roads, bicycles/bikeways, walking (walkable cities), none (telecommute)). The place where the taxes are focus is the world we are creating. Currently, the US seems to like roads a lot. Other countries like trains and high speed trains. Though there are more possibilities than just cars and trains.