"It was the applicant's submission through counsel that, regardless of any other relevant circumstance, a plea of guilty pursuant to the fast-track system demanded a known 'tariff' discount of the sentence which the criminality of the offence, having regard to all relevant circumstances, would otherwise demand. He argued that the tariff discount should be 20 to 25 per cent and that in the applicant's case, having regard to his antecedents, the discount should have been increased beyond the tariff to between 30 and 33 and a half per cent. That submission had its genesis in the statement of Anderson J in R v Greenwood, unreported; CCA SCt of WA; Library No 9602093; 21 May 1996 that, for the fast-track system to work, accused persons must be certain that the immediate plea of guilty will carry a definite reward in sentencing, His Honour adding that 'Deductions up to 30 per cent are not uncommon;' and in that of Malcolm CJ in Stretton v R, unreported; CCA SCt of WA; Library No 950282; 1 June 1995 that the discount 'is often of the order of somewhere between 20 to 25 per cent and 30 to 35 per cent.' What the submission overlooks is that neither statement suggests that that range contains the minimum discount. As Malcolm CJ said in Hellings v R, unreported; CCA SCt of WA; Library No 940440; 24 August 1997, speaking of the desirability of encouraging guilty pleas, 'That objective can be achieved by giving credit to the early plea by way of mitigation of sentence imposed in discounting it to the extent considered appropriate'." (underlining added).
This Court has often said that each case must be considered on its own merits and that consequently there is and can be no tariff setting the penalty appropriate to any particular offence or the deduction for any particular mitigatory matter. What might be appropriate by way of sentence or deduction for a mitigatory matter such as an early plea of guilty in one case might well be inappropriate in another. Indeed it may result in an injustice, either to the offender, the complainant, the criminal justice system, society or some or all of them. (See R v Cameron and Simounds, unreported; CCA SCt of SA; Judgment No S4051; 19 July 1993 per King CJ).
It is trite to say that mitigatory matters must be taken into account in sentencing, the weight to be given them varying as required by the overall relevant circumstances. It is accepted, however, that, save in rare cases, an early plea of guilty should result in a recognisable discount. The extent of that discount, however, will vary according to the circumstances of the particular case. Nevertheless, in my opinion, it must be recognisable in the sense that the penalty imposed must be objectively seen to be below that which its criminal gravity would otherwise demand. Such recognition has specific benefits to the complainant and the community, even when the evidence against the applicant is overwhelming in that, at the very least, it relieves the complainant of the necessity to give evidence, the prosecution to collate its evidence and prepare for trial and the State the cost of a trial."