I remember a claim (from Vlassic itself?) also that Walmart pushed them into producing larger volume SKU's, against their (Vlassic's) detailed data on usage, shelf life, etc. Result: more mouldy pickles in peoples refrigerators. Hurt Vlassic as a brand, not really in consumer interest, but Walmart could advertize a $/volume nobody could match.

I met an independent trucker who said he sometimes did pressure relief for a large logistics company but would refuse any Walmart deliveries (not to the stores, to central warehouses). He claimed they gave you a 15 min delivery slot on a cross country route, they only way to avoid penalties was to aim to be there hours early and wait on your slot. He said it basically added 3-6 unpaid hours for every trip, and wasn't worth it.