Most folks are professionals who want to do good. Let them! If you provide a system that empowers them and provides unobtrusive accountability, they will own it. A wiki provides such accountability by recording and publishing who changes what when.
That is enough to reduce the risk and consequences of malicious or incompetent changes to near zero, while improvement ignites.
Conversely, an obtrusive system discourages contributions and improvement.
That is enough to reduce the risk and consequences of malicious or incompetent changes to near zero, while improvement ignites.
Conversely, an obtrusive system discourages contributions and improvement.

Regrettably, I think it is my own experience with regulators and auditors, that have led me to act on many preventive actions.
Auditor: Who can make changes?
Organization: Anyone, anytime.
Auditor: Who is authorized to approve changes?
Organization: Any person making changes.
Organization: ...but there's a system of traceability, so it's ok.
The auditors I've dealt with, this would not fly...
