[notyourwork]

Are businesses in the business of increasing efficiencies (more revenue, more profit, lower costs) or are they in the business of doing what is in the best interest of consumers or both?

I don't think your example really holds weight. I goto Costco because they offer products I want at a price I like. If during shopping they were trying to give suggestions to better deals I'm not sure as a consumer I get to complain about it do I?