Well, forcing gas to be cheaper had some unintended side effects in Venezuela:<p><a href="http:&#x2F;&#x2F;www.wsj.com&#x2F;articles&#x2F;SB10001424127887324000704578386771059515346" rel="nofollow">http:&#x2F;&#x2F;www.wsj.com&#x2F;articles&#x2F;SB100014241278873240007045783867...</a><p>Anyway, I don&#x27;t see how such a tax would single out the poor more than others.<p>The negative externalities of burning gas to move cars (not to mention weed whackers and lawnmowers etc., which are somehow exempt from emissions controls and pollute horribly) need to be accounted for <i>somehow</i>. See: The tragedy of the commons.