The Jungle
How much oil would be washing up on the shores of the Gulf of Mexico without government interference and regulation? Self regulation seldom works. Did you ever read "The Jungle" by Upton Sinclair?
In ending government subsidies for all energy would you include the subsidy that fossil fuels get when they don't have to pay the cost of externalities such as increased asthma and heart disease, etc for people exposed to the byproducts of their use?
It's not nearly as simple as you make it out to be.