There's no consistent and transparent pricing for individual skills on a resume, so you can't sum them up, adjusted by years of experience, and reach a rational number. Job titles can be similarly vague. Plus there's no premium for having a useful bundle of skills as a single hire (companies charge us for convenience and bundling all the time though!)

This seems hard, but plenty of analytical brain power could be applied towards this. But there's also no will for companies to reach pricing frequency and fidelity like a stock market or retail because the inefficiency is in their favor and I suspect the real numbers that would come out of that would be much higher.