[markofzen]

It's not a secret if your company uses any of the large payroll services due the Equifax "The Work Number".

[anamexis]

Don't you need to specifically authorize someone to use that to get your salary?

[lupire]

Not if that someone is Equifax itself or any of its hackers.

[anamexis]

Sure, any payroll company (or their hackers) knows your salary.