Most states and provinces I think have already applied a flat yearly registration fee surcharge to make up for lost gas tax revenueIndeed. No one is contesting that. So what is your point?
In as you are leveling some sort of complaint against a flat tax, are you attempting to claim that any tax is unfair? If so, why?
Let's look at Alberta:
https://www.alberta.ca/electric-vehicle-tax-claims
Here, it states the yearly fee is $200.
Now let's compare to gas taxes in Alberta:
https://en.wikipedia.org/wiki/Motor_fuel_taxes_in_Canada
So about 50 cents per litre for both federal and provincial gas tax, which disappears if you charge at home. And yes, the federal tax counts, as the federal government transfers funds to the provinces from that tax, and to municipalities, and also gives additional grants to municipalities from that tax.
All which vanishes without a gas tax.
So that's around 1/3 to 1/2 of the price you pay at the pump.
Municipalities also sometimes add additional tax.
All said?
A good average for gas tank size might be 50 litres. Gas prices are typically over $1.20 / litre. So maybe $70 per fillup, which seems fair. Let's just pick $30 in tax per fillup.
I'm being generous here, as most EVs are as heavy as a truck, and cause more road damage than a gas car. And I'll also be more generous, and just say $20 per fillup in lost tax.
This figure, $20, is way below the actual lost tax. I expect this to be more like $50 lost per fillup, with the above logic (weight of vehicle, use of taxes, local taxes).
So with this extremely generous number of $20 per fillup, a yearly registration of $200, is the same as 10 tanks of gas of travel per year.
Or less than one fillup per month for a gas car.
This is obviously meant to be an average, and there are people which drive 200km per day. Others may almost never drive, but that's how averages work.
I have a very, very hard time seeing this as unfair.
I feel it is very, very low compared to what is collected from the gas tax currently.
The only other option is to have odometers inspected yearly, and a tax levied on actual distance driven. In as the tax is very very very generous, and only 40% of what I suspect the actual loss to be, very very very low at $200, few would be better off with a tax on actual distance driven.
Not to mention, a yearly inspection would have additional costs (re: taxes) for the whole administrative framework to do so.
All in all, Albertans seem to be paying far less than people driving gas cars, in tax.
But of course, you did the math before complaining about Alberta flat gas tax, right?
So if so, what is your complaint with this flat tax?
That some people might be buying at $50k CDN car, and only drive it less than 400km per month, and so unfairly pay? Because that's the equivalent tax being levied here.
I'll be very blunt. I find such complaints to be frivolous.