Imagine if you will, a modern cafeteria in one of the 48 US states during the 1950's, back when McDonald's was really just a startup with less than 100 outlets,

Imagine if you will, a modern cafeteria in one of the 48 US states during the 1950's, back when McDonald's was really just a startup with less than 100 outlets, not universally familiar. This would be in black & white. There were already well-established positions as handing-out-food-machines in the cafeteria serving line. These never have been high-paying jobs, but otherwise over the decades evolving levels of stress would seem to be dependent on benevolence of owners when it comes to balancing the gradual benefits of mass production/automation with their employees. These were usually very low stress jobs back then, so at one time there was a lot to work with.