His Honour expressed his view of the proper approach to vicarious liability in this way (at par 320):
To determine whether conduct is within the scope of vicarious liability I would favour the broader "connection" analysis adopted in England and Canada … This Court should now give guidance on the general question of when, in all the circumstances, it is reasonable to impose liability on a party … I do not overlook the fact that determination of the "connection", necessary to establish legal liability, will itself involve value judgments and policy choices. Ultimately, these oblige the decision maker to answer the question whether, in the particular circumstances, it is just and reasonable to impose on the enterprise in question legal liability for the particular civil wrong done by its employee. Try as verbal formulae and specific rules might, they cannot ultimately escape the necessity to answer this basal question.
18 Gaudron J analysed vicarious liability in terms of the law of agency, including the notion of ostensible authority. After considering the authorities, her Honour said (at pars 128-131):
… to hold an employer liable for the authorised acts of an employee or acts done in the course of his or her employment, is simply to apply the ordinary law of agency. … where the issues concern the doing of an authorised act in an unauthorised way, it will ordinarily be the case that vicarious liability results from the ostensible authority of the person whose acts caused injury to the plaintiff.
The difficulties that have arisen in relation to vicarious liability concern the absence of any real test for determining whether an act occurred in the course of or within the scope of employment. That difficulty is exacerbated in the case of deliberate criminal acts which, save, perhaps, for some temporal connection, cannot ordinarily be described as acts done in the course of or within the scope of employment.
The only principled basis upon which vicarious liability can be imposed for the deliberate criminal acts of another, in my view, is that the person against whom liability is asserted is estopped from asserting that the person whose acts are in question was not acting as his or her servant, agent or representative when the acts occurred …
Ordinarily, a person will not be estopped from denying that a person was acting as his or her servant, agent or representative unless there is a close connection between what was done and what that person was engaged to do. …
19 Gummow and Hayne JJ saw no need to reformulate the statements of principle in Deatons. After referring to the judgment of Dixon J in that case, and the fact that it was concerned with vicarious liability for an intentional tort, their Honours said (at par 231):
… there are two elements revealed by what his Honour said that are important for present purposes. First, vicarious liability may exist if the wrongful act is done in intended pursuit of the employer's interests or in intended performance of the contract of employment. Secondly, vicarious liability may be imposed where the wrongful act is done in ostensible pursuit of the employer's business or in the apparent execution of authority which the employer holds out the employee as having.
20 Their Honours concluded (at par 239):
For present purposes, it is enough to conclude that when an employer is alleged to be vicariously liable for the intentional tort of an employee, recovery against the employer on that basis should not be extended beyond the two kinds of case identified by Dixon J in Deatons ; first, where the conduct of which complaint is made was done in the intended pursuit of the employer's interests or in the intended performance of the contract of employment or, secondly, where the conduct of which complaint is made was done in the ostensible pursuit of the employer's business or the apparent execution of the authority which the employer held out the employee as having.
21 Callinan J did not consider Deatons, but firmly rejected the test propounded in Lister. His Honour said (at par 345):
In practice there would be few situations in which a "connexion" between the duties and the conduct would not be able to be demonstrated. Distinguishing between "opportunity" which would almost always be available to any teacher, and a "connexion" of the kind referred to by their Lordships would be very difficult. Cases would, as a practical matter, be decided according to whether the judge or jury thought it "fair and just" to hold the employer liable. Perceptions of fairness vary greatly. The law in consequence would be thrown into a state of uncertainty. I would not therefore be prepared to adopt their Lordships' or any like test. In my opinion, deliberate criminal conduct is not properly to be regarded as connected with an employee's employment: it is the antithesis of a proper performance of the duties of an employee. Furthermore, it cannot and should not be regarded as being "interwoven" with proper and dutiful conduct, let alone inextricably so.
22 It will be seen that their Honours do not speak with one voice about how the test for vicarious liability should now be expressed. Deatons has not been overruled, and Gummow and Hayne JJ saw no need to venture outside the statements of principle to be found in it. On the other hand, Gleeson CJ's formulation appears consonant with that of Lord Steyn in Lister. Kirby J's certainly is. Gaudron J used the language of estoppel, without reference to the question whether it would be "fair and just" to hold an employer liable, but her Honour saw the closeness of the connection between the employee's conduct and the nature of his or her duties as a relevant matter.
23 In the light of this recent development, it is clear that the decision of Master Malpass must be revisited and that I should myself determine whether the amendment should be permitted.
24 In Gibson v Parkes District Hospital (1991) 26 NSWLR 9, in the context of a proposed amendment to a statement of claim, Badgery-Parker J referred to the familiar principles enunciated by Barwick CJ in General Steel Industries Inc v Commissioner for Railways (NSW) (1964) 112 CLR 125 at 128-9. Guided by those principles, his Honour said (at 15):
Upon an application to amend, it is well-established that leave to amend will not be granted if the amendment is so obviously futile that it would be struck out if it had appeared in the original pleading … The principles applicable are the same in whichever form the matter comes before the court. The amendment will be refused if the defendant or intended defendant can demonstrate, as he must on an application to strike out an original statement of claim, that the case is hopeless. It is not the case … that the application to amend should be refused unless the plaintiff can satisfy the court that the cause of action pleaded therein discloses a viable cause of action.