[the_common_man]

Don't think this is unique to Walmart. Being big players, it's always very hard to play hard ball them for small business.

[protomyth]

Its amazing how many times Net 30 turns into Net 120 when dealing with a larger company. I noticed (in the 90s when I cared about such things) that companies that paid from banks at the end of the chain (like, oh say, a Montana bank) were more likely to pull that crud.