They (like I) have tried this too many times in the past only to be met with the same "leave"response, intimidating emails, bonuses withheld and a few even threatened with dismissal. How many times do you piss into the wind before you figure out that its just not worth it? I think all of us aspire to a sensible approach to employee/employer relations but it will take a major change in mandate from the top.
What I abhor is the arrogance:
Don't piss on my head, then tell me it's raining