Paul I kind of agree with you, but not completely, as long as you are talking in terms of decades ahead.
There are no decades ahead as things stand, we are already at the bottom of the extracted energy pot.
We either change now or go extinct, along with most other life on Earth.
The thing that pulls the carpet out from all conventional economics in the presence of growing solar energy, is inflation.
The physical mechanisms driving this inflation are new, unique to our time of using both extracted energy, and solar energy.
A new economic paradigm of "Kardashev Money" has appeared, and even been demonstrated, but still we fall back to the old default of money as debt, which ties us into extraction, which is the thing unsustainable.
But still the solar capacity scales up, unmonetised, thus undermining the old value of money as debt.
Inflation will continue to remove all value of the supposed fortunes of all the richest, until they give in and allow the issue of Kardashev Money, to correctly and honestly reflect the value of sunlight put to use by technology.
So it isn't decades we are looking at, before we see this shift to Kardashev Money but a year or two at most, it seems to me.