So you buy an electric car, and pay your money to TXU, rather than Exxon. You think Exxon is going to sit by and let that happen? You think TXU will sit idley by and let zoning codes require every new house have a solar panel installed.
Again, in the CAB case, the people running puplic ads against electric cars and California's requirement that electirc cars equal 10% of cars sold at a certain time period were in the oil buisness. So again, these companies make lots of money of current consumption habits and will use their influence to keep the status quo intact.
It is not a coincedence that Tom Delay helped defeat a Houston proposal for an extensive LRT system, considering that many of his top campaign contributors were oil companies.