I think it's a debatable question in a descriptive sense. It's an open question whether people vote primarily in their material self-interest vs ideology etc.

But I think in a normative sense, it would be impossible to avoid questions of ethics or other "ideological" constructs. Even the most materialist analysis contains agents that act in a self-interested manner, and behind that self-interest are ethical or normative preferences that are worthy of examination on an individual basis, as opposed to strictly a collective sociological analysis.

Why did you link to a Wikipedia article about Jevon's Paradox that argues that efficiency gains will lower resource consumption? It's not at all clear to what extent this occurs, and it shouldn't be taken for granted that it happens to the degree you claim it does.

"However, governments and environmentalists generally assume that efficiency gains will lower resource consumption, ignoring the possibility of the effect arising.[3]"

If you have something philosophical to say about the merits of capitalism, you ought to make a separate point, or at the very least tie the two together in a coherent way.