Re:Wal-Mart is essentially eliminating the middleman
This is really like "on-site pharmacy" lite. While the sponsor does not receive the full benefit of their own pharmacy, catering to their employees needs, buying at deep contract pricing, they do get the full benefit of the negotiated price. It's easily verified and easy to administer. All things that HR departments like.
The PBM response to this is bad because "the pharmacies just want added foot traffic"? Duh! Express scripts needs a refund from their spokesperson's salary.