The underlying problem here is third person intervention, because as it stands an outsider is being encouraged to dob in a boss, regardless of the arrangement two people may have, and regardless of whether or not such arrangements are mutually agreeable.

This is where the problem lies.

By all means if one is unhappy, take it up, however, even the FWO will say something like, "we advise you speak to your boss before filing a complaint", why the sudden change.