@stux Here in the US, not only do lots of people like to roll around in big stupid trucks, but the auto makers are actually incentivized to make bigger vehicles. Fuel economy standards that the government imposes upon them do not apply when the vehicles are over a certain size or weight (likely thanks to the big petrochemical lobbyists).
So less efficiency + public appetite for wankpanzers = higher profit for auto makers and oil companies. Blech.