[lostmsu]

Unless you can show such a policy, it is reasonable to assume it does not exist. I surely have no way to prove otherwise short of finding complete list of all policies. A good indication is that neither of us heard about it so far.

[simondotau]

If we have no evidence, it is not "reasonable to assume" anything.

Meanwhile, I'm merely saying that it wouldn't surprise me if such a policy exists, whether formally or informally. The distinct lack of any product on Walmart shelves which has a below-RRP price printed on its packaging is strong circumstantial evidence at the very least.

[lostmsu]

It is reasonable due to the Occam Razor.

The fact that you mentioned is an extremely weak evidence in the light of very thin margins Walmart has (under 3%), which is more than 10 times less than the old store tax, with probably even smaller incentive to combat.