Should be an announcement from Ontario soon. Don't blame them, evs don' pay any road use tax and weigh considerably more which is also harder on the roads.
This is always the argument and it is poor for more than one reason.
The "road tax" is just a tax that goes into general revenue. It's not actually used for roads exclusively, nor is/was it ever enough to cover the costs of roads.
EVs, especially right now, cost more upfront than an ICE car, and with Alberta having a 5% PST they are getting this "road tax" upfront. Will that always be the case? No, but it is the case right now. If ICE and EV get to price parity, maybe then they could look into additional taxes for EVs, but we are not there yet.
EVs do weigh more than an exact replica car, and some are ridiculous like the Hummer EV, but a Model 3 weighs about the same as a Toyota Camry so whatever.
Both Alberta and Saskatchewan also offer reduced tax fuel for farmers, loggers, and other industry. You know who does more damage to a highway than my Model 3? A Super B trailer full of wheat. But they pay no "road tax" (or reduced in the case of Alberta). So if it was truly about the roads, these industries would pay tax on the fuel because they damage the roads, but they do not.
This is a money grab and a dog whistle at the same time. Everyone knows it. There is no sneakiness here. Alberta makes a lot of money off oil and gas, and are currently against anything that might disrupt that industry.
Also, there are cost savings long term with EVs. Climate change costs money. Ignoring that, while typical in Alberta/Sask, will cost money and already does.