I imagine you would have to ask them if you are wondering about a specific company.

as I said in most hiring announcements salaries are posted so it would be easy to compare what the going offers are out there. government salaries must be available to the public.

I am sure there is a way to factor in employment history, education, skillset, etc to get the salary for the position needed. some positions require hs degrees, other some college, other BA's , MA's & advanced degrees..that would involve higher salaries. increased skill training would increase salary as well. there ar emany factors that could be plugged in to a position to arrive at a competing salary..management and personnel would have all of those available to them

factors such as :
education : hs, aa, ba, ma, phd degrees
languages spoken : English, French, Spanish, etc
skillset: computer skills
advanced training: any advanced or specialized training you have that places you above other applicants or is need for the position
ability to travel
etc