Subsidies are justifiable as long as there is a need to counter-balance existing subsidization of the gasoline car ecosystem. In other words, a subsidy that one

Subsidies are justifiable as long as there is a need to counter-balance existing subsidization of the gasoline car ecosystem. In other words, a subsidy that one should be able to do without in a vacuum is still needed in an environment where extraction, transport, refining, etc. of fossil fuel is all more or less subsidized.