Student comments from meetings frequently overreacted to by senior 'management'
[Converting a comment to an answer at the invitation of @hueblue...]

I feel you are focussing on the wrong part of the issue here. It does not make sense to encourage 'management' to ignore the student representative's views; inevitably this will just create problems and bad feeling in the future, when students get the impression that their input is ignored. 

The real issue is that (at least in your perception) the student representatives are not doing their job properly: they are using their position as a platform for their personal views, rather than those of the student body at large. It seems to me that this is what you should aim to address. Some things to consider:


How well do the student body understand the role played by their representative(s)? 
How are elections handled? Are they treated as important, or an annoyance to be dispatched as quickly as possible in the first lecture of the year? 
Is the student body aware of the issues that are being discussed in meetings attended by their representative(s)? Do they know when meetings are due to take place? 
Are students reminded to send comments to their representative(s) in advance of relevant meetings?
Is there a clear, well-advertised, equitable opportunity for the student body to get together and discuss any issues and concerns they have with the representative(s)?
Do students have any way of knowing what their representative(s) said in meetings? Are minutes or summaries circulated to the student body at large?


I suspect that at present, the answer to most of the above questions is 'No' - certainly that was the case when I was a student. If you can change some of them to 'Yes', you will probably see a marked improvement in the quality of representation.