The question is, if we all went green and stopped driving big cars or all stop driving cars overnight, tomorrow, where would the money come from to make up the tax income shortful in the government coffers?
The answer is of course some other form of taxation, we would suffer crippling taxes in other areas of our lives, and my opinion is we are already taxed enough.
My advice is, carry on driving what you want the taxes are going to be less than if you don't, and a lot less fun than driving a car with enough grunt to chuck out more than 225g co2/km...
Don't get me wrong this isn't a political statement, every government we have had to date has increased motoring taxes, left or right.