Following your thought, there’s no reason they cannot require you to pay for your gasoline electronically and perpetrate all sorts of evil that way. “Sorry Dave, your social score needs some work. I can only sell you five gallons today.”
Or “Sorry Dave, you are driving way beyond your allotted miles. I can only sell you five gallons today.”
They can mandate transponders on all cars. Just like telescreens were mandated in “1984” and couldn’t be turned off.
Don’t think that they aren’t working on using the transponder on your car, that states are using to pay tolls, that they won’t use them to track your vehicle once the technology allows for it.
Electric cars are just easier to convert for this purpose at the moment.