I've been thinking about how to execute this for quite some time. What I need: * A wide range of employers who provide a shortlist of what they consider to be

I've been thinking about how to execute this for quite some time. What I need: * A wide range of employers who provide a shortlist of what they consider to be the factors that define the top 1%, 20%, & 50% in any given skill set plus a respective list of appropriate salary levels for said skill set. * A list of employees who fit into each criteria and their average, current salary. You would then need to source that data for every geographic region. TL;DR: It's theoretically possible, it simply requires a lot of grunt work and co-operation & honesty from employers & employees.