I am not familiar with the exact location the incident took place but I am assuming that it's not an urban area. Speaking as a police reservist it would be difficult to be officially posted in such a location.
As reservists we are utilized as force multipliers. Economy of force dictates where and how we are deployed. Effectively what this means that unless a location has a recent history of serious crime or is considered \"high profile\" it is doubtful 2 ppl would be deployed there ( we never work alone ) for an entire shift. This is more true for a rural setting than an urban one.
Personally as a fellow climber I would gladly take one for the collective team and look pretty for an 8 hour stretch. Hell, I may even bring my rack along and do a \"tactical\" climb or two.
However, the SAPS would more than likely see such a posting as an \"inefficient use of manpower\".
It wouldn't hurt to ask though. Phone up the local station and get the contact details for the head reservist. Maybe you will find that he could infact get 2 ppl posted.
Regarding payement in such a circumstance it would effectively amount to passive corruption. I am not saying that it doesn't happen - one is regularly reminded in the media about \"cops for hire\". The majority of reservists I know however would decline anything over and above an ice cold coke.