he thinks the powers-that-be will engineer a dieoff down to a more sustainable level

We know that life is cheap to most people. (Unless it is yours - then it gets expensive) And we know that most people LIKE being comfortable.

So when you have an equation like this:

Total_Energy = Number_of_People x Personal_Energy_Useage

And Total_Energy is dropping - how do you balance the equation? Cut into Personal_Energy_Useage (and perhaps effect your comfort)? Or cut somewhere else?

Of course, if one is already using very little energy, then TPTB have very little to gain by eliminating one, do they?

Reducing one's personal energy use might be a good strategy to make oneself a little less vulnerable, on several different levels.

Odds are that the decision will be based on what is produced for the level of consumption. In that case very low consumption and zero contribution, or negative contribution, is probably not going to be a good place to be.