Same old trick in a new venue. This has been happening for a long time in Asian warehousing, but has hopped the pond this last decade or so. Worker’s efficiency is set to a certain rate of efficiency, then they’re reprimanded/fired for failing to meet it. The catch is that it’s a challenging pace to begin with, and the window for successful completion almost-imperceptibly narrows, eventually becoming so ludicrously small that they must injure or maim themselves trying to beat it or even match the pace. Once they quit or cripple themselves, the company simply slides in a new candidate who doesn’t yet understand just how Hellacious the work is.