13 The important consideration is to make the process of giving credit for pleas of guilty, assistance to the authorities etc, transparent: R v Thomson (2000) 49 NSWLR 383 at [162]. This is best achieved, in my opinion, by the judge specifying a notional starting point before specifying the discount or discounts allowed, otherwise the offender may get the impression that although a percentage discount has been specified, no such discount has been in fact been allowed: R v Mako [2004] NSWCC 90 at [21], R v Lynn [2004] NSWCCA 222 at [13], R v Sutton [2004] NSWCCA 225 at [16]-[17].
14 As pointed out in Thomson at [160], it is generally desirable to quantify the effect of the plea and particular encouragement is given to specification of the discount for the utilitarian value of the plea, although where there are other relevant considerations, such as contrition or assistance to the authorities, a single combined quantification will often be appropriate. As highlighted in this case, it will generally be desirable to specify separately the allowance that has been made for future assistance, so that applications by the Crown under s 5DA can be more conveniently and justly dealt with; in many cases this will be better specified in terms of years and/or months rather than in terms of a percentage.
15 Applied to the sentences in this case, the total effective sentences may be compared as follows:
Applying Successive Discounts