Why is whistleblowing treated as an ethical instrument rather than as disloyalty?
Because it is the escalation route of last resort when the normal channels are compromised — it exists to uncover undesirable actions that the hierarchy has an interest in not seeing.
In the standard toolkit whistleblowing systems (Hinweisgebersysteme) sit at the personal level of business ethics, alongside leadership and employee ethics — and their stated function is to uncover undesirable actions. That placement is deliberate: the firm-level instruments (mission statement, code of conduct, guidelines, incentive systems) all depend on the organisation applying its own rules honestly. Whistleblowing is the instrument for the case where it doesn't.
The reason it is an ethical instrument, not merely a control, follows from the profile of economic crime: offenders are usually senior, well-regarded and able to dispel suspicion or circumvent the control bodies. Formal controls are designed and supervised by exactly the people most capable of defeating them. What such a system cannot neutralise is a colleague who knows what is happening and has a route to report it that does not pass through the person implicated.
This also explains the design requirements that make the difference between a real channel and a decorative one:
- Independence — the report must not route through the implicated chain of command.
- Protection from retaliation, legally backed, since the reporter's career is the asset at risk.
- A credible follow-up process, because a channel that visibly leads nowhere trains everyone to stay silent.
- Internal before external — a functioning internal route is what makes going to the press unnecessary, which is in the firm's interest too.
Against this, the "disloyalty" framing is really the group-pressure and the-embarrassment-of-contradicting mechanisms wearing a suit: it relocates the wrong from the person who committed it to the person who mentioned it.
Go deeper:
Wikipedia: Whistleblowing — the legal protections that exist, the retaliation that happens anyway, and the famous cases.
Ethics Unwrapped: Moral Muteness — why people who see the wrong describe it in any terms except moral ones — the habit a reporting channel has to overcome.