Student feedback-based evaluation performs a significant social role in framing perceptions of the quality of teaching in contemporary Australian higher education. Yet its emergence is a relatively recent phenomenon, having only been in widespread application since the mid-1980s. The early manifestations of student feedback-based evaluation came with newly emerging academic development units with a motive to enhance the quality of local teaching and to afford student retention. However, new motives for assailing student feedback evolved with the rapid growth in student numbers, the introduction of student fees and heightened levels of inter-institutional competition for students. As a result, student feedback-based evaluation progressively became also a powerful proxy measure of teaching and curricula quality assurance at an individual, institutional and sectoral level [Blackmore, J. (2009). "Academic pedagogies, quality logics and performative universities: Evaluating teaching and what students want." "Studies in Higher Education", 34(8), 857-872. doi:10.1080/03075070902898664]. This generated critical tensions between the seminal motive of student feedback around quality improvement, and the rising quality assurances discourses, academic performance management demands and institutional marketing. In this paper, the complex social origins of these competing motives for student feedback-based evaluation in Australian higher education will be explored and analysed. It is argued this provides an important means of understanding the polarising effects of student feedback-based evaluation in Australian universities.