What a great explanation of how the gas tax cuts won’t accomplish anything. Check it out.
The current debate is an empirical question: how elastic are the supply and demand for gasoline? Paul Krugman has argued that the refineries run flat out during the summer driving season, so there’s no excess supply on the market. Meanwhile, consumer demand is rapacious, so they’ll just bid up the price of however much gasoline refiners can supply, handing the oil companies a windfall. In our original example, if you reduced the excise tax by $1.00, consumption would move from Point B to Point A, with the amount drivers use rising somewhat, and the price falling somewhat. The suppliers reap most of the financial gains: they sell more gallons, and get 55 cents more for every gallon they sell.
Or this quote.
But this is not the only reason, or even the best reason to be against lowering the gas tax. Remember Megan’s Third Law: to spend is to tax. Unless the federal government is going to lower spending to match the lost revenues, we’re just going to take the money from somewhere else, now or in the future.
Hillary Clinton’s proposal is particularly stupid, in my humble opinion, because it tries to get the money back from the oil companies with a windfall profits tax. Tax incidence is tax incidence: if the oil companies can make consumers pay most of the excise tax, then probably consumers can stick them with your windfall profits tax too. Meanwhile, the instinct to mess with the oil companies every time prices rise is thoroughly counterproductive. We (at least, those of us who want cheaper oil) want the oil companies out foraging for more supply. If you lower the returns on finding new oil, you kill their incentive to do so–more importantly, you kill the incentive of investors to give them capital to do so. All her plan does is make us take the trouble to build new administrative capacity to collect the tax, while keeping all the old administrative capacity for collecting the excise tax (since, after all, it’s not actually going away permanently), while scaring the bejeesus out of investors. It’s lose-lose-lose.
The fact that it still helps in politics goes to show how politicians care more about the appearance of helping rather than actually helping. And how people who vote based on their “gut” without looking at the reality of the situation can create the opposite effect that they intend. Cool stuff.

