[qooleot]

Yes, that would be interesting data. Most companies would output reports from their HRIS systems in wildly different formats, and you'd have to adjust for industry, geo/currency, year, gender/ethnicity/language, and all sorts of things. But just getting that data and the sensitivity that goes with it would be near-impossible unless you were a salary survey company. And then, they get job-level data and not per employee. They charge serious money for the services of analyzing this data and do not make their data available.