I don't agree on the extra tax for £40k+ but I do agree on charging every vehicle. To charge nothing was insane and really wound me up because every car contributes to it all.
It's a long way to go before we pay nothing given that even beyond this system there's still what... 80ish pence a litre in duty going to the treasury?
It just seems like rolling it into fuel duty is the fairest whilst still covering all the bases that the government wants to cover - i.e it will encourage a new wave of fuel-efficient vehicles in order to minimise fuel cost, which will in turn benefit the environment.