Earlier quoted context omitted.
The amount of leverage workers have is proportional to how hard it is for the company to replace them. Replacing unskilled workers isn't that hard so those workers don't have much leverage. The only real solution is to become skilled workers. Which, almost ironically, is to do the thing the company threatens to do -- find a way to automate work like this, so the people working at the warehouse are robotics technician…
Isn't Amazon getting to the point where they're having trouble finding employee candidates they haven't previously fired?
This apparently happened somewhere in a rural area with a small local population. It's obviously not going to happen at a warehouse in, say, New Jersey.
And to the extent that it actually happens somewhere it's not like their response would be hard to predict. Calculate how much they would have to increase local wages to expand the candidate pool enough, see if this is less than it costs to move the warehouse somewhere with a larger pool of workers, if not then move the warehouse.
Notice that Amazon warehouse workers get paid more than minimum wage. This is why. Unskilled workers don't have zero leverage, they just don't have much.