A company like Amazon doesn't treat its warehouse workers as human beings. Workers are seen as disposable: forced to piss in bottles, forced to work around the corpses of their collapsed coworkers, paid the absolute minimum possible, and replaced the second they don't operate like a perfect unfailing machine. You aren't viewed like a human, you are a tool. Cattle. A piece of meat they are forced to retain because a robot isn't quite capable of doing your task yet.
The article's use of "meat shields" isn't any different. Humans are going to be hired for the sole reason of taking accountability for actions dictated by AI. They are there only because the company can't put blame on a machine and will be sued to oblivion if there's nobody to blame at all. Your existence as a person is irrelevant, they are just interested in someone with a heartbeat they can blame when stuff inevitably goes wrong.
if said person can be blamed (and take on the liability), but cannot stop the action or audit the action, take preventative measures (which costs money) etc, then they cannot take responsibility for real and thus whether the blame falls on them on paper is irrelevant - if there's real punishment (like jail time), but no real power to enforce anything, then who would be stupid enough to take on this job? If there's no real punishment, then what does it matter that the blame on paper is there?
Edit: Further, the only times "meat" appears is in the phrase "meat shield", which is an analogy that is very apt relative to the crux of the article.
Edit 2: "People" appears 13 times!