This is all so vague.
We come from decades if not a century of spectacular growth and yet "technocratic managerialists have failed", what, where, how?
The United States comes out of 25 years of unprecedented growth, in spite of two major economical recessions and has outpaced the majority of advanced economies.
You’re using top line numbers to make that assertion, but gains are not evenly distributed.
There’s prolific ink spilled on the failures of technocratic managerialism over the past 40 years as gain become decoupled — and particularly over the past decade as the breakdown has reached critical mass.