Kwh based tax is the exact analog, but as I said earlier, the taxing bodies don't want to make an analog to what we have now for ICE vehicle they want to replace what ICE has now with GPS for everybody. This isn't an EV only issue, and I hope people pay attention, it will effect every one who drives a car, no matter how it is fueled.
Again, it opens up fee's for how,where and when you drive, where and when you park and complete record of your movements. This should be a concern for everybody. Having that info, it is just far too tempting to use it in ways, that they claim they will not. "We only "need" that info for road tax" yeah, well there are other ways that have worked for a century that don't involve tracking. Ask yourself why this is the only avenue being pursued, and it becomes clear they want the info, the tax is the reason given.
Crime fighting would be easy if we all wore ankle monitors, but I for one, am not will to accept an ankle monitor as a trade-off for "safety". This is what is being proposed.
Pay as you go, makes even the poor able to pay the tax, once a year, makes it hard to budget esp when the amount of use, and tax rate may vary widely. Anything short of pay as you go is going to be a nightmare to make functional.
I am sure the fuel retailers would prefer not to collect the tax, but have done so for a century. I know the power company would also prefer not to collect the tax, but they ARE a public utility, however, and for that monopoly, should be able to record and charge the tax.