It's an interesting distinction you bring up. What is our goal? Do we want to ameliorate the plight of the poor with a fuel tax or RUCs? If that was the goal wouldn't a tax based on the age or price of the vehicle be more effective?

Personally, I was heavy vehicles and gas guzzling vehicle to be charge more because they:

put more wear of the roads
requie us to import more fossil fuels

[–] Ilovethebomb@lemmy.nz 1 points 2 days ago

We also don't want to give people an incentive to drive an old car either, because that's it's own set of problems.

There's also the fact that hybrids are typically heavier than a conventional power train, because of the extra equipment they carry around. These vehicles might end up paying more in RUCs as a result of this.

It's also worth noting some of the biggest and thirstiest vehicles on the road are people movers and SUVs, often driven by people with big families who need a large vehicle.

Charging by GVM is probably the fairest and simplest way to run the scheme.