i dont think its a green issue its a massive cash-cow for the government and has been way before anyone worried about co2 or dwindling resources 
oh its a green issue now as its convenient to maintain the high tax, but what was the excuse previously? 
Yes I'm inclined to agree with that given the levels of road fuel taxation down through the years.
It's not as big a cash cow as a bouyant economy. Oh, there I go again. These are career politicians we're talking about. 

Kevin
Yes, that's another important point K.
Running an economy by managing strategic resources or shaping population behaviour using the blunt instrument of taxation or restriction of service or availability is typical of behaviour of those in government who are bankrupt in ideas.
This inclination seems to have been the preferred method of revenue raising by our political masters of late - hence the apparent lack of forward thinking and concern over the real effects of this economic and social miasma that this country has been directed towards by those very people in government and opposition.
When are they going to act to protect our people rather than notional ideas about duty to Europe, the UN, the worldwide political structure and the bloody environment?