Because "full price" isn't the same. Varies by pharmacy and even by the part of town where the pharmacy is.
Pharmacy's in high income areas often have lower pricing than in low income areas. Call it what you want, but it happens.
Not just limited to Rx.
Malt liquor and menthol cigarettes are higher priced in low income areas than high income.
Back to Rx.
The pharmacy's wholesale cost can vary from one drug to another based on volume and the PBM pricing. Kgmom can explain this better.
The drug part, not the malt liquor/Salem pricing
Right, so not "the gov't"