[95] Mr Grant-Taylor has carried out an exercise to attempt a calculation of the probable past earnings assuming that the plaintiff did maintain himself in employment within the mining industry. That exercise results in a figure, after tax, of nearly $500,000.[69] The artificiality of the exercise needs to be recognised. Mr Grant-Taylor took as his starting point the income that the plaintiff had in fact earned in the 1998-99 year of $10,176 gross, pointed out that that had been earned in a period of only 101 days (from 1 July to 9 October 1998 - which ignores the fact that the plaintiff had been seeking such work in the six months prior) and then, extrapolating out those earnings to a full financial year, arrived at a starting point of $36,775. He then assumed a roughly similar income for the succeeding year and then increased the assumed gross income by $5,000 per annum through to 2004 and then by $10,000 thereafter, arriving at a figure of $104,000 for the 2008-09 year which accorded with the evidence of Mr Johanson.[70] No evidence was led of any comparable employee to demonstrate that the assumed increments reflect reality. I comment that the onus of proof lies upon the plaintiff to establish his loss, that the exercise is little more than speculation, and in the absence of better proof some further discounting would be appropriate.