Walmart has laid down a gauntlet for its retail rivals by giving employees a full 10% discount across its grocery products. The chain used to offer that deal for the Christmas season, but has expanded it to make it a full-year employee benefit.

Under the terms of its former deal, the chain's workers had a very limited discount, while the offer is basically unlimited.

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In a letter sent to Walmart employees, Chief People Officer Donna Morris made it clear that requests concerning this sort of expanded discount had been among the most frequent by the company.

"We've heard your feedback that these savings make a real difference for you and your families. And we have continued to hear that you would like to see this ben

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