as somebody already said earlier, a boundary has to be set somewhere...so no, your system is fair enough (probably too fair, imo), and you dont deserve grade adjustments.
Popping up borderline marks is stupid (considering mq adjusts marks anyways, from my memory). It is unfortunate you just missed out, but "them's the brakes, sister."
evidence:
in a 70% weighted chemistry exam last year...i answered less than 50% of the exam (literally put put to paper, that is)...and still ended up with a CR 68 as my final mark....so it looks like (to me) that macquarie are already adjusting marks for the students benefit.
i dont understand why macquarie choose to use such a ridiculous grading/ gpa system. Awarding the same gpa for a distinction/ high distinction mark doesnt make sense, and just seems as a result of the continuing willingness (or should i say, stubborness) of macquarie university to be "different" from other institutions. Handing out less HD's/ D's doesnt really reflect the calibre of the institution, if anything it reflects the content isnt being taught (or absorbed) effectively.
The reason other institutions produce higher grades..is generally because those students are of a higher calibre, particularly across professional-accredited courses, where specific outcomes need to be met ( which are completely independent of the university)
by the same regard, why not call your degrees 'gobbledicooks' in essence to be "innovative"...better still 'certificate IV?'...lol..jks
seriously, though- it is unfortunate that you guys have to put up with it...as you have some bright minds there.
oh well...i guess you could always transfer...