33 Whether or not the gloss on the general rule referred to in Brailsford has its foundation in the old requirement for sworn pleadings, it is in accord with modern practice in not permitting parties to litigate whatever issues they choose, only the crucial issues. See, eg, Ashmore v Corporation of Lloyd's [1992] 1 WLR 446 at 448 and, more generally, UTSA Pty Ltd v Ultra Tune Australia Pty Ltd (1996) 21 ACSR 457 at 459.
34 The appellant cannot therefore say that the trustee failed to put in issue whether she gave consideration for the disbursement: once the learned primary judge found that she had received and applied $90,167 of the bankrupt's moneys in constructing her house, there was nothing more for him to determine before he was entitled to hold that the trustee's claim as pleaded and as pursued at trial was made out and to conclude that that disbursement was void by force of s 120 the Bankruptcy Act.
35 Having found that the disbursement of the sum of $90,167 of the bankrupt's moneys with his authority to the appellant was void as against the trustee by force of s 120(1) of the Act, the learned primary judge was entitled to make the order charging the appellant's Wishart property with payment to the trustee of that sum (with interest). At the time of judgment, these moneys did not of course continue to exist in the appellant's hands as an identifiable fund. But they had been applied by the appellant to the construction of the house on her Wishart property and so could be traced into that property. Accordingly, the trustee was entitled to have handed over to him so much of this asset of the appellant's as represented those moneys (and interest thereon). See Brady v Stapleton (1952) 88 CLR 322 at 332 and Official Trustee in Bankruptcy v Alvaro (1996) 66 FCR 372 at 426 - 427.
36 Contrary to the appellant's submission, this tracing remedy is available to the trustee even though the disbursement was held void under s 120 and not under s 121. A person to whom property is transferred thereby acquires a good title to the property from the transferor, though it is a defeasible title, because the transfer may later be held void as against the transferor's trustee in bankruptcy under any of the provisions of ss 120, 121 or 122 the Bankruptcy Act should the transferor later be made bankrupt. Where the property transferred or other property into which it has been transmuted remains in the hands of the transferee when the declaration of voidness is made in favour of the trustee, that declaration is effective to destroy the transferee's previously good title to the property (or at least to so much of the property as is necessary to meet the demands on the bankrupt's estate) and to give the trustee the right to the property (or the necessary portion of it). See Brady v Stapleton at 333 - 334; Official Trustee in Bankruptcy v Alvaro at 426 - 427 and Ebner v Official Trustee in Bankruptcy (1999) 161 ALR 557 at 574 - 575 (appealed to High Court on other points). This is so where the declaration is made under any one of these sections of the Act. It is the fact that the previously effective transfer is declared void that produces this result, not the ground upon which the declaration of voidness is made.
37 No reason was shown for thinking that the trial judge was in error in awarding interest on the $90,167 or that the amount awarded by way of interest was excessive.
38 By his statement of claim, the trustee claimed in the alternative to the claim under s 120 judgment for the sum of $111,667 withdrawn by the appellant from the bankrupt's account as moneys wrongly applied to her own use. The trial judge found that the appellant did apply $90,167 of these moneys in accordance with the directions of the bankrupt and so refused to give the trustee a money judgment for that sum (though, as I have said, he gave the trustee other relief in respect of that particular sum). However, he gave the trustee judgment for the balance of $20,000 on the basis that the appellant had applied that sum for her own purposes and contrary to the purposes authorised by the bankrupt.
39 The appellant challenges this money judgment. Counsel submitted, in reliance on David Securities Pty Ltd v Commonwealth Bank of Australia (1992) 175 CLR 353 at 390, that the justification for a claim for moneys had and received by the defendant to the use of the plaintiff is that the defendant is thereby unjustly enriched and that the appellant was not so enriched here. It was said that, notwithstanding the finding that she misapplied the $20,000, she was still authorised to spend that sum on her Wishart property for the purpose of building a home which she would own in her own name, but in which both she and the bankrupt could live together while he was alive. Counsel says that she was able to provide the bankrupt with the benefit he sought when he gave her the proceeds of sale of his own home, by applying only $90,167 of his moneys to that purpose: she met the rest of the construction costs from her own credit union borrowings of $35,000, which she repaid some years later from moneys she received from third parties. It was said that the appellant was not unjustly enriched at the bankrupt's expense even though she misapplied the $20,000 of his moneys, because she provided him with the benefit he sought and because she applied an equivalent sum of her own moneys to the same end as that to which she should have applied his $20,000.
40 Trustee's counsel did not object to this argument being advanced for the first time on appeal. Nor did the trustee dispute the appellant's proposition that the judgment for $20,000 could only be supported as a restitutionary remedy based on principles of unjust enrichment. His answer to the contention that there was no proper basis for the money judgment was that the appellant would be unjustly enriched at the expense of the bankrupt's creditors if allowed to retain the $20,000. But that cannot be right. All that relevantly vests in the trustee for the benefit of the creditors is the cause of action of the bankrupt. The learned primary judge found that the bankrupt authorised the disbursement of his moneys, including the $20,000, to the appellant in circumstances in which the bankrupt was to obtain in return only the right to live in the Wishart house, a right that died with him in October 1996: the bankrupt and thus the trustee are unable to say that disbursement of the $20,000 to the appellant was for the purpose of procuring an enduring benefit to the bankrupt (and his estate) in the form of an interest in her house property of which the bankrupt was, in part, deprived by the appellant's misuse of the $20,000.
41 Neither counsel considered it necessary to draw the Court's attention to any of the cases which deal with the essential elements of a restitutionary claim based on the principles of unjust enrichment. Those principles can be taken to be those stated in Restitution Law in Australia, Mason and Carter, 1995 Butterworths at par [203]. Firstly, the appellant must have received a benefit (as she did in the form of the $20,000 she spent on herself); secondly, receipt of the benefit must have been at the bankrupt's expense (as it was, since it was his money) and, thirdly, the circumstances of the case must be such as to show that it would be unfair, unconscionable or inequitable for the appellant to retain the benefit.
42 In view of the findings of fact made by the trial judge, not challenged on appeal, but sought to be circumvented by this new argument, there is, in my opinion, no justification for setting this judgment aside.
43 At trial, the appellant's case with respect to the $20,000 was that she had the bankrupt's oral authority to spend it on herself. The learned primary judge expressly rejected her claim here: "because of my views of the [appellant] as a witness and because such authorisation would be inconsistent with the bankrupt's wish to see the money applied in building the house at Wishart". The appellant also relied on the fact that she held the bankrupt's general power of attorney and the presumption of advancement to show that she was entitled to deal with the money as she had. The learned primary judge rejected these arguments too. See par [52] of the reasons. The presumption of advancement is applicable in a wider class of case than that in which a husband purchases property in the name of his wife with his own moneys. It was applied in favour of a wife, to a voluntary transfer of property made to her by her husband prior to, but in contemplation of, their marriage in Wirth v Wirth (1956) 98 CLR 228. But the learned primary judge made findings that the bankrupt authorised her to apply the moneys he gave her to the building of the house at Wishart and rejected her claim that she had his express authority to spend the $20,000 of his moneys on herself. These findings leave no room for any operation of the presumption of advancement: see Wirth at 237 and Calverley v Green (1984) 155 CLR 242 at 249, 251, 255 - 256.
44 His Honour expressed his conclusion in par [54]: