Part 1 of the Local Government Act 2000 introduced a power for local authorities in England and Wales to promote the economic, social and environmental well-being of their area although this was repealed in respect of England when the general power of competence was introduced.
On that basis, if a planning application is broadly represented, by the public to the PC, as being contrary to public well being, and the argument for such is credible, then it could be argued that the intent in the provision of the GPC as a replacement for the ability within LGA 2000 to act in the 'interest' of the community was to encompass the ability of a lower tier authority to act, incidentally (and the incident is the opportunity to present comments of support or objection to a planning application) in such a fashion....
I totally accept the argument that long and costly battles would be beyond the reasonable means and justifiable use of tax payers money - but my current example is a single application for an agricultural conversion which is currently pre-determination and where the consultee obligation may be best discharged by engaging a planning consultant to compile the PC comment.
I'm reasonably content that this would be simultaneously incidental (to the obligation to consult), good VfM and a appropriate representation of the well being of the community.