I am aware of Steve Keen's work, But thanks for the pointer, John. Steve's work is amongst the best around, imho, but as far as I can tell it is old school, based on a fixed capital / zero-sum economy, with no consideration of energy effects.

MMT can only temporarily offer relief, hence why money issued as that has to be finite. So, stimulus / relief payments are always expected to be recouped in the longer term by being a kind of debt.

But that only held when the system was closed box, i.e when the base of all capital was more or less constant. Now it isn't, we are adding an awful lot of things created from Joules from the sun, nothing was destroyed to make any of that product, no "Peter was robbed to pay Paul", only stuff created, as if from nothing. So the base capital is now physically expanding, with the rate of expansion accelerating, even a piece of gold has to technically depreciate in value, relative to the total capital.

And none of this capital added by solar has been monetised, since the only way of monetising it is to issue money for free.

I believe this energy connection and issue might have been put to Steve, but as yet I don't see any sign that his work has incorporated it.

Note anyone with significant historical published material will be very reluctant to change direction, as they have to worry what folk buying their books previously might think, when they find out the information they paid for no longer applies...