You mean productivity of any sort no longer being a feasible goal? 
I know of at least one government department in London that still has that sort of arrangement. The canteen, which is run by a contractor, sends one of its staff round with a trolley twice a day with stuff for sale. Tea, coffee, chocolate bars, fruit, some sandwiches and the like.
Was around in Australia until the 80s. Even in the 90s, we had a full canteen with hot meals, and a couple of hours before your break, the canteen lady would cvome downstairs onto the work floor, and you could order a full hot meal.
The horseracing section in with the sport on the evening news also had betting tips from “The Tealady”. Haven’t thought of that for years.
When I worked for a government department in New Zealand in the early 1980s, we had a tea lady who came around to our offices.
Productivity and efficiency haven’t been a goal of British industry since Queen Victoria died 
In seriousness, it was largely an effort to keep people motivated during long/irregular working hours.
Basically they discovered that by splicing in a couple of ten minute tea breaks at the beginning and near the end of the shift, productivity increased (i.e. the production lines maintained a consistent output throughout the shift rather than peaking/troughing).
(It doesn’t show that i’ve just finished reading a short history of the role of tea in the Second World War does it )
Ah, but how the employers have tried! Remember the time & motion men of the 50s? These guys were hired by the bosses to spy on the workers, noting the time they took to do things, etc. The unions were not amused.
See the movie I’m All Right Jack!, where John Le Mesurier plays one of these T&M guys.
When my dad worked in NASA in the early seventies, they had a coffee lady in Mission Control who they called the Total Logistics Coordinator.