You need to give your manager the ammunition. A manager going to HR with "cost of living increase please" vs "I have a valued member of my team who is dropping

You need to give your manager the ammunition. A manager going to HR with "cost of living increase please" vs "I have a valued member of my team who is dropping hints theyre unhappy about pay" are very different things. You're presuming all employees are like yourself. Not everybody is motivated by money. I have team members who are well paid, know it, and turn down large increases elsewhere due to the projects they have excite them, etc.