I can think of two big changes that happened around then, and both had long-term repercussions:
Nixon Shock
Deunionization
Although these are kinda related too, because you need savings to strike. Credit ratings are a horrifyingly opaque way for corporations to tell us how long we can last.
Only some of it is libertarian trash. The majority of those graphs could be equally interpreted as the need to move towards a more socialist policy.
I can think of two big changes that happened around then, and both had long-term repercussions:
Although these are kinda related too, because you need savings to strike. Credit ratings are a horrifyingly opaque way for corporations to tell us how long we can last.