[aerohead]

It will be 2-weeks before I can 'hear' Hagens You-Tube as I won't have access to the Saturday-only computer, with audio until then.(community work party and memorial service for a neighbor who died).
I did just look at a synopsis of MacKay.
My immediate impression,is that his argument is reminiscent of those which attempt to employ the Jevon's Paradox as if it were a absolute rather than a conditional,contextual,artifice.
There is a historical precedent in the USA in which the national energy load was literally transformed overnight by government edict.
It required a war declaration,but no structural changes to existing infrastructure.
The federal govt.took control of propaganda,industry,transportation,the motion picture industry,radio,print media,rubber,oil,agriculture,railroads,education,s peed limits,instituted rationing,redefined manhood,patriotism,loyalty,................... the list goes on and on.
I don't know what MacKay's life experiences are,but he may be completely ignorant of social dynamics which are in no way abstract.
I'll dig deeper,but I'm already questioning his perspicacity coefficient,mandatory in the art of war.