right....i'm skeptical the technology actually exists....i.e. free energy.
however, if it DID, it would be easy for the government to make money - up car tax, introduce road tolls, increase VAT rate on car purchases, increase taxes on car insurance
and of course, this would only lessen the demand for oil - which the oil producing countries would counter by cutting production. but other oil users would suddenly find the tax rate on crude oil had shot up significantly as well
soooo, you see, it's easy for the government to continue fleecing us
Read Ben Eltons Gridlock, it is an amusing light read on the subject of a motor engine that doesn't need oil. (it's been 15 years since i read it, might read it again now!!)