Were this capitalism, the competition would simply win by offering lower prices, but Kroger was allowed to grow to monopolistic proportions so that they’ve either bought up any and all serious competition already, muscled rivals out of business or settled on quasi-gerrymandered spheres of influence with their equally monopolistic competitors, so that nobody undercuts them when they abuse their status to not offer the best deals, but instead price-gouge the people stuck in their sphere of influence.