with regard to 3, i think the larger question is, is that what is best for society? to create elite clubs based on who you know vs merit, capability, output volume etc.
I don't know if finding ways to expand someone's network and connections necessarily means we have to create elite clubs - having networks is vital to success in any way, especially in a system based on merit.
So maybe I was one step ahead of what you were saying. I read it as more along the lines of given the entire set of X people in our education systems, how do we ensure a system that is fair and allows for the maximal human flourishing of each individual member while taking into account our psychology and the negative externalities / side-effects of emergent system dynamics. (Of course this last point, is something we sorely need in many fields - not just education).