I bumped into this video on my hard drive that I had not yet shared.... I remember when I first began seeing Walmart putting a lock on the lid of their trash cans.
Recorded in 2016.
https://1a-1791.com/video/fwe2/b0/s8/2/E/d/h/r/Edhry.haa.mp4
They can't tolerate anyone getting free food! If they feared lawsuits, they could put a disclaimer on the trash telling everyone it's not intended to be eaten so if anyone does, they do so at their own risk.
Most of the food they throw out is probably safe to eat. If people could eat without the need for money, they would be less inclined to take the mark of the beast.
I have seen poor people pick through the smaller trash cans on the side of the building, and eat what they found right there in the parking lot. Walmart does not put a lock on those cans (yet).