Tell that to the oil barons
Who you vote for is irrelevant. There is no government or opposition that would sanction free fuels and lose the taxation it brings in - not without implementing some other taxation system such as mandated black-boxes which show road-usage in all vehicles etc. In addition, I doubt the fossil fuel billionaires are going to sit by and watch oil get replaced. It's conceivable they'll use the oil for plastics etc, but in reality I think they will simply buy all the patents for the free-fuel technologies and sit tight on them until such time as the last few barrels of oil are consumed.