Yep, WallyWorld is notorious for forcing companies to toe their price line or lose out on a potential staggering number of sales.
How do companies do it? Sacrifice the product: Remove features, cheapen the packaging, reduce the quality of materials, reduce the quality of the manufacturing, reduce the quality of the fit and finish.
Play their way, or go away.
It's an older article, but a good read and still very relevant for info on the biggest company in the world:
http://www.fastcompany.com/47593/wal-mart-you-dont-know
"It does more business than Target, Sears, Kmart, J.C. Penney, Safeway, and Kroger combined."
"It sells more in three months than Home Depot does in a year".
'Think a company with revenues of 250 billion a year can't push Kershaw (revenues no more than $25 million) around?
Think again.