Update 30 May 2018
The New Yorker published, in it's May 14, 2018 issue, a review of the book Can Democracy Survive Global Capitalism (Norton) by Robert Kuttner. (The review is written by Caleb Crain.)
As is the case for many articles in that magazine, the review borders on impenetrable, but it does discuss factors surrounding my issue at considerable length. Based on the review, the book glorifies the economic system, both US and international, that existed after the Bretton Woods agreement (1944), and
prior to 1973. According to Kuttner, 1973 marked "the end of the postwar social contract." To quote Crain, "Politicians began snipping away restraints on investors and financiers, and the economy returned to spasming and sputtering. Between 1973 and 1992, per-capita income growth in the developed world fell to half of what it had been between 1950 and 1973." Income inequality increased, the median real income of "working class" Americans fell. And, significantly, "faith in democracy slipped."
Kuttner/Crain discuss a number of things that went on beginning around 1973 (including the fallout of the Arab oil embargo), but, from the philosophical standpoint they hang the economic turn-about on the return of laissez-faire philosophy to the political sphere. Eg, in January, 1974, the US removed the constraints on sending capital abroad, and in 1978 the Supreme Court overturned most state laws against usury. A litany of effects basically gutted Keynesianism as it had previously existed, and the US economy (and the world's) lost its balance.