Barker is useful because it separates two things employers often blur together: whether Australian employment contracts contain a broad implied duty of mutual trust and confidence, and whether an employer has still created obligations through its own contract, policy or conduct.
The High Court rejected the broad implied term. That does not mean redundancy or redeployment processes are risk-free. A badly handled process can still create unfair dismissal, adverse action, discrimination, consultation or contract risk depending on the facts and documents.