All this is not intended to defend Walmart. But if you really want to
get mad, get mad at Big Pharma, which has been gouging all of us
severely for many years. Far worse than the oil companies.

Walmart is certainly the largest retailer of pharmaceuticals in the
world. They take a cut.

It would be interesting to know if Walmart can bully Big Pharma the
way it bullies other manufacturers. I would guess Walmart has much
less "countervailing power" in that arena.

vince