You don't stockpile fuel, you stockpile crude oil. There isn't an oil shortage currently (have you stopped to a servo that doesn't have any fuel?). The problem is people trading on the futures market. The media makes up some story and the futures trade accordingly. Surprisingly it isn't supply and demand dictating the price currently.
And the fuel excise... Do you think its cheap to build a road and then maintain it? Or would you prefer cheap fuel and dirt highways everywhere? Honestly people, do you think the excise is going into someones back pocket? And what happens if you suddenly drop 50c/litre off the fuel price? Now inflation is out of control again and the money has to be taken out of the economy via interest rates again. So even if they did by some miracle drop the fuel excise, like it or not, you're still going to be out of pocket somewhere else.
Personally I think rising fuel prices are the best thing that could have happened to this world.