Superficially, the world economy in 1929 looked in better shape than it did two or three years previously.
Then it crashed.
And in 1930, the economy was on the threshold of net energy availability doubling every decade for five consecutive decades (1, 2, 4, 8, 16). It took an extraordinary degree of incompetence not to to sustain growth under those conditions.
We are on the threshold of net energy availability halving every fixed period, indefinitely (1, 0.5, 0.25, 0.125).
I think the statement that linkage between long term diminishing EROI and financial instability may be incorrect has, at best, no basis in observable reality.