Yes they have to be taxed, right now the taxpayers are supplementing the selling price of many of these cars in the actual purchase price itself with $7500 rebates.I fully expect ICE (private) vehicles to be taxed off the road as EVs become more affordable and the charging infrastructure put in place.
The EV owners right now are getting away with not maintaining and building our roads, I can’t wait for that to stop either!
In addition non-EV owners will be paying to upgrade the electric grid and power plants.