How about the Post Office?
;^)
If you wanted to do a study on DEFLATIONARY PRESSURES AND THEIR CONSEQUENCES you could start at USPS.
Since the early 1970s they had a 700% increase in productivity per workhour. I was one of the first of the budding young employees at Headquarters to come up with a device that would displace one employee for every one device purchased. That became a goal or ambition of others as well, and they worked it to the bone.