'The paramount question always is one of interpretation of the particular statutory provision and its application to the facts of the case.' [33] The simplicity of this question, however difficult it might be to answer on the facts of a particular case, shows that the Ramsay case did not introduce a new doctrine operating within the special field of revenue statutes. On the contrary, as Lord Steyn observed in McGuckian's case[1997] 3 All ER 817 at 824,[1997] 1 WLR 991 at 999 it rescued tax law from being 'some island of literal interpretation' and brought it within generally applicable principles. [34] Unfortunately, the novelty for tax lawyers of this exposure to ordinary principles of statutory construction produced a tendency to regard Ramsay as establishing a new jurisprudence governed by special rules of its own. This tendency has been encouraged by two features characteristic of tax law, although by no means exclusively so. The first is that tax is generally imposed by reference to economic activities or transactions which exist, as Lord Wilberforce said, 'in the real world'
'[T]he driving principle in the Ramsay line of cases continues to involve a general rule of statutory construction and an unblinkered approach to the analysis of the facts. The ultimate question is whether the relevant statutory provisions, construed purposively, were intended to apply to the transaction, viewed realistically.' [37] The need to avoid sweeping generalisations about disregarding transactions undertaken for the purpose of tax avoidance was shown by MacNiven (Inspector of Taxes) v Westmoreland Investments Ltd[2001] 1 All ER 865 ,[2003] 1 AC 311 in which the question was whether a payment of interest by a debtor who had borrowed the money for that purpose from the creditor himself and which had been made solely to reduce liability to tax, was a 'payment' of interest within the meaning of the statute which entitled him to a deduction or repayment of tax. The House decided that the purpose of requiring the interest to have been 'paid' was to produce symmetry by giving a right of deduction in respect of any payment which gave rise to a liability to tax in the hands of the recipient (or would have given rise to such a liability if the recipient had been a taxable entity). As the payment was accepted to have had this effect, it answered the statutory description notwithstanding the circular nature of the payment and its tax avoidance purpose. [38] MacNiven shows the need to focus carefully upon the particular statutory provision and to identify its requirements before one can decide whether circular payments or elements inserted for the purpose of tax avoidance should be disregarded or treated as irrelevant for the purposes of the statute. In the speech of Lord Hoffmann in MacNiven it was said that if a statute laid down requirements by reference to some commercial concept such as gain or loss, it would usually follow that elements inserted into a composite transaction without any commercial purpose could be disregarded, whereas if the requirements of the statute were purely by reference to its legal nature (in MacNiven, the discharge of a debt) then an act having that legal effect would suffice, whatever its commercial purpose may have been. This is not an unreasonable generalisation, indeed perhaps something of a truism, but we do not think that it was intended to provide a substitute for a close analysis of what the statute means. It certainly does not justify the assumption that an answer can be obtained by classifying all concepts a priori as either 'commercial' or 'legal'