Honestly I don't know. A warehouse associate at Amazon makes ~25% more than a stocker at Walmart does (though Amazon is probably a somewhat harder job). To me, knowing very little about the specifics of labor organizing, Walmart seems like a more logical target. Though that's been very unsuccessful historically. Maybe there's someone experienced in the field on here who could explain how they do target selection?

I know amazon is a very organized and advanced company, but you can be sure that one thing walmart has invested in and stays on the cutting edge of is union busting. I would wager they are operating on a different level than amzn when it comes to union busting and union avoidance.

Had a friend that was a butcher at walmart back when there was talk of unionizing. It was a walmart in a small town and the moment even a rumor of unions started spreading, walmart was flying in corporate jets full of lawyers and psychologists and educators to make sure that no one unionized.

I guess they decided the risk was too great so they shut down their meat packing section in every store across America. I believe to this day, there are no butchers in walmarts. They bring in the meat pre-cut and pre-packed. Probably by a wholly owned subsidiary that they can easily shut down if things ever go sideways.