How is it untrue? What people, who did not reach an agreement with Walmart to work together, are working at Walmart?

Why would Walmart even want to have workers who walked away from the table during negation, of whom they have no employment agreement and are technically not even employees, working for them? That doesn't make any sense to me whatsoever.

Even ignoring the sketchy legal ground, it seems like a huge liability to have what are effectively random people walking in off the street doing work at your store. I am still dubious that Walmart, or any other business for that matter, would allow this.

When you put it that way, it sounds like Walmart is doing them a great service. Keeping them off the street. And saving the taxpayers welfare dollars at the same time.

Walmart's MO was to setup shop in towns, undercut the competition until there was no competition left and then raise prices. A great service indeed.

Did you know that people who profit from child labor help hungry kids eat?

This is a particularly malicious rationalisation historically.