KPI's for HR Professionals

I have not met a single person till date who has said "The HR folks in my company is good". Not a soul. Prime reasons are coz they believe HR has no clue about what the Line Management really requires, they screw around with salaries on the grounds of standardisation / maintaining parity etc etc. I should probably not generalise HR folks with those responsible for Staffing coz it is them who most are pissed with.

So i have been thinking: What are the basis, KPI on which HR people are evaluated or to put it more bluntly how do these folks get their bonuses or what really is their use?

Talking about use, i find them rather redundant coz:
1. Line Management freezes on the Roles & responsibilities and more often than not even has in mind a couple of people they deem fit for the job.
2. Interviews are hosted by Line Managers.
3. Retention / Cross Functional Mobility more often than not is driven by Line Management as well.

So what do the Staffing / HR guys do "Maintain Employee Databases" or "Launch Job Opportunities on the Intranet"? This for sure they do!

Can someone shed some some light? KPIs of HR Employees / Criteria for receipt of Bonus?