Yes... and no, depending on your definitions.
In October 2019, GetUp! submitted a "Political Campaigner Return" to the Australian Electoral Commission (AEC)
With "electoral expenditure" of $2,314,890 and total payments of $14,446,914, Advance Australia can argue that only 16% of the payments went on electoral expenditure in financial year 2019.
I believe this question is based on a misunderstanding of the poorly-expressed claim (which seems to be plagiarised on many sites).
Compared with the distortions caused by First Past the Post voting, Preferential voting gives an advantage to minority parties:
Dr Peter Chen from the University of Sydney said preferential voting allows for a greater ...