It may well be discrimination but is it illegal discrimination? As you know (being an HR professional), discrimination is only illegal if it's based specifically and directly on things like race, gender, religion, age (over 40), disability, whistleblowing, and so on. So can you elaborate on which of these categories your company's discrimination in this area is based upon?
Thanks.
(And as flyingron has reminded you, employers aren't legally required to enforce their company policies anyway.)

