The original implementation is different from what it's turned into. There was a heavy emphasis on listening to workers and understanding why each step of a process was important (or not) and making appropriate improvements. The top-down one-size-fits-all manager hellscape framework approach (scrum etc) is more a product of the Clinton era.

Well, scrum was invented by a Vietnam-war combat pilot (what the hell did he know about producing value as opposed to wasting value, for example by dropping ordinances).