Mahony v J Kruschich (Demolitions) Pty Ltd

The plaintiff, Mahony, brought an action against his employer, J Kruschich (Demolitions) Pty Ltd, seeking damages for personal injury sustained in the course of his employment. The defendant employer sought to join the plaintiff's treating doctor as a third party, claiming a right to contribution from the doctor on the basis that the doctor's alleged negligent treatment had contributed to the plaintiff's continuing incapacities. The High Court of Australia considered the employer's claim for contribution.

The central legal issue before the High Court was whether the defendant employer could claim contribution from the plaintiff's doctor under section 5(1)(c) of the Law Reform (Miscellaneous Provisions) Act 1946 (N.S.W.). This provision allows a tortfeasor liable for damage to recover contribution from another tortfeasor who, if sued, would have been liable for the same damage. The court had to determine if the doctor, by providing allegedly negligent medical treatment, could be considered a tortfeasor liable for the same damage suffered by the plaintiff as a result of the initial workplace injury.

The High Court held that the employer's claim for contribution was not maintainable. The court reasoned that the damage for which contribution was sought was the plaintiff's continuing incapacities. While the initial injury was caused by the employer's negligence, the subsequent medical treatment, even if negligent, did not cause the *same* damage as the initial injury. Instead, any negligent treatment constituted a separate and distinct wrong, potentially giving rise to a new cause of action for the plaintiff against the doctor, but not creating a liability for the *same* damage as that caused by the employer. The principle applied was that contribution under section 5(1)(c) is only available where the tortfeasors are liable for the same damage, not for different or successive damages.

Consequently, the High Court dismissed the defendant employer's claim for contribution against the plaintiff's doctor.