In terms of energy efficiency, it is obviously crucial, but under our current system every improvement simply represents surplus capital which then goes towards growth and expansion. Changing that, again, requires collective long-term planning and decision making which is being subverted.
I think it is giving far too much (or too little?) credit to the powerful to say there is "ignorance at the top". There is not ignorance at the top. They have demonstrably understood this looming crisis for a very long time, and what we are seeing is the expansion and fortification of existing power relationships in the face of it.
If ignorance and lies are being spread at other levels of power, again, I think it's worth asking "by what means?" and "for whose benefit?"