> There is a lot of salary data available for people through services offered by the credit bureaus.
This is based on self-reported data to creditors. I've never had a creditor verify my stated income in any way, they always waive in because my score is good enough.
I posted a link in one of the siblings to your comments, but this data results from employers giving/selling the data to Equifax for their The Work Number service.
I have to say I'm surprised at the number of HN readers who are unaware about the availability of this data.