Can you? I think the implicit counterclaim in TFA is that other supermarkets/stores don't fail state pricing inspections nearly as often. If you have evidence/articles showing that TFA has cherry-picked dollar stores for criticism, that would be helpful to share.

I've got one local grocery store where the meat prices are sometimes off and another where it's the bakery. The fact that it seems to be confined to certain departments makes think it has a lot to do with the quantity and quality of labor being applied. And dollar stores being dollar stores they apply the cheapest and they apply it sparingly. Not that that excuses it but it at least explains it.