I Should Never Have Trusted HR to Keep My Secret
forbes.com
forbes.com
It is not an internal ombudsman representing the interest of individual employees against other parties (especially management) within the firm.
Every interaction with HR should involve this understanding being front and center.
You mean required by government? Because it's pretty obvious why management doesn't require HR to highlight their adversarial relation to employees—it benefits management for the human resources to see the HR department and their friend and ally.