'Just one example - giving employees open access to company materials affects the privacy rights of other people, not just the company. So in order to protect the privacy rights you do have vs the company, they will have to restrict other people's access to your information."

I'm not sure this is a good example. Bear in mind that 'the company' is just other employees. I am not aware of any particular set of 'rights' limiting which employees have access to your information - just policy which is entirely decided by the power hierarchy.