So perhaps Bush's intention is to make refining less risky and more profitable for the majors by giving them land (military bases) and tax incentives and outright subsidies?
That may be the angle. It would fit with the rest of the energy bill

Still, I think the assumptions about current demand and current prices continuing into the future would have to be fairly well established to make long-term sense. ChevroTexaco is basically trying to buy Unocal's oil reserves through their proposed merger based upon the assumption that at least the price part of the equation will stay significant. It's all a balance though, and the ChevronTexaco move is likely safer than new refinery construction given current crude prices.
I'll have to ask around a bit and check the details, since it doesn't make much sense otherwise except as a feel good "doing somthing" throwaway measure, IMO.
Charon