I would very much prefer free market forces to change people's minds about buying huge SUV's than government influencing the market with some kind of a tax.
If the availability of oil weakens, the price will go up. If it goes up high enough, people will change their spending habits. There is no need for government to intervene.
Current: 2015 i3 REx | Giga | Ionic Silver Metallic
2013 550i xDrive | Jet Black | Venetian Beige | Dark Red Sycamore
2008 535xi | Jet Black | Cream Beige | Burl Wood
See, when the Government spends money, it creates jobs; whereas when the money is left in the hands of Taxpayers, God only knows what they do with it. Bake it into pies, probably. Anything to avoid creating jobs. - Dave Barry