Applicant Quality: Top 50% 25% 10% 5% 1% 0.5%
Salary for this pos: Top 50% 25% 10% 5% 1% 0.5%
In short, it would be great to call out those companies that want employees in the top 1% but are only willing to pay in the top 50%
Every single employer values the top 1% differently. Take permanent Ruby Developers for example, I know of a company who's valuation for the top 1% is absolutely spot on. I know of another company in the same area that values the top 1% at about £10k less per annum. The point is, they both genuinely understand what the skill level and experience level of said 1% is, they just significantly disagree on the value of said 1%.
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.