People only SEE the flows.
You have identified the problem that members of future generatioins are not part of the price determination for the good in question. If we include the next generation's demand for oil in the current demand, then the market price would be higher, and the current generation would consume less. Thus, the question is whether the resource is essential. My reading of Ecological Economics literature suggests that there are at least two fundamental assumptions that differ from classical economics. First, intergenerational equity is paramount, such that the social discount rate is zero in the absence of technological change.