Follow the bouncing ball folks.
As people drive less because of both increasing fuel costs and their consideration of their "Carbon Footprint" this causes a problem for the tax man.
As people conserve down goes the tax digest. The state needs the money to pay for road maintenance, salaries and new construction projects.
What to do? What to do?
Got it! We can switch to a "usage based" tax scheme. That way if you use Crisco oil to fuel your car or electricity generated from solar - the tax man can still get his "fair share" out of your wallet.
But wait! With this type of tracking of your vehicle what is going to stop you from becoming the next "OJ Simpson with the White Bronco"?
Some of the most stalwart protectors of privacy will likely yeild because they like the money streaming into the government.