Companies have gotten really good a simplifying human jobs so that new hires with few skills can be quickly trained up to replace underperforming or otherwise problematic workers. There are high paying management jobs (a few of them) for producing and optimizing employment manuals, procedures, performance targets and input kiosks so that the absolute lowest common denominator hire can quickly fill a void.
As an example McDonalds "upgraded" their order taking turrets from using words for each food item to pictures for each food item. That meant they could employ people who couldn't read, because I guess literacy was a limiting requirement in their hiring process. McDonalds employs over 400,000 people. Just a small "savings" across that employment base is worth millions. That millions of savings get's split between shareholders and the top tier of management who designs and implements these "process enhancements".
And the new thing is to order online from your smartphone and pick it up at the counter. That gets rid of the order taker entirely and you can staff with mostly "behind the scenes" worker bees that don't even have to speak English. That is until you can get a robot to make the food too.
Call centers have been doing this for years with average call time metrics, flow charts for addressing caller needs, etc... It's happening in lots and lots of industries now.