As far as I'm concerned, Walmart stores have no redeeming qualities. It's an interesting place to go people watching and not much else. I'm glad we don't have any in this country.
But I think they operate on a pretty small margin don't they? Like 3%? If they raised wages, by just 145 dollars a week for each of their 2.2 million employees, they'd wipe out this year's 15.2 billion profit. But they can't give up all their profits, so let's cut it by half. They could then give 72 dollars a week to each employee. Although it could make difference in some people lives, $75/week isn't much. It's lunch money. A drop in the bucket of what is a "living wage".
Any further improvements to would have to come out of the pockets of Walmart's extremely price conscious customers, who could easily take their business to lower cost online outlets.
The thirst for more and more stuff for less and less money, has created a kind of economic death spiral.