Companies are trying to prevent people switching jobs to get raises by creating a central database of all employees and their salaries. That way, when you try to find a new job they can pull up your salary history and not accidentally give you a 40% bump when your desperation factor clearly shows you'll settle for 10%.

I assume adp is just one of those companies doing this, and you opt out by not participating in the economy.

Go here: https://employees.theworknumber.com/. Create account log in, surf through myriad of pages to find the way to opt out. It's in there somewhere.