Maybe the people of Whole Foods, the entrepreneurs, the investors, the daily stakeholders, are in fact working towards the benefit of society as a whole because that's what motivates them. Many people find their happiness in the growth and happiness of other human beings. It is implied that this other-centeredness is normal only if it is confined to romantic partners, or nuclear family, but who among us isn't moved by the struggles of a population ravaged by natural disaster, war, plague or famine? It may well be that one's motivations, human creatures as we are, might be shoehorned into the rubric of self-interest (misleadingly named though it would be) by saying that other-centeredness makes us feel better. But one might as easily say that one's more self-centered actions are in fact shaped by the entire society as in the invisible hand, designed in fact to help others: your food choices are not, in fact, your own, but shaped by corporate stakeholders for their own interests. You can look at it either way.
The point is that motivations are varied and complex, and cannot be summarized neatly in phrases such as 'utility' or 'self-interest' without hiding demons worth of complexity within them.
I personally work for others, for the people of the world, the whole of its green mantle, the earth's future potential. In this way I extend my extended phenotype, it is true -- in some way I will exist and persist as forces and memes and influences varied and grander and grander, with time, if cloudier, muddied, dilute. But I will also be working for something that has always been and will always be greater than my own small self. There is joy in this, but it is not centered in me.