If an organisation wants to encourage good candidates it is a good idea to provide the sort of detail such a candidate would reasonably want.
It is all a question of perspective of course, but as I read it, it is the lowest (or one of the lowest) rates for a current police helicopter pilot in the UK. If you add all the costs of transport and accommodation (which the pilot would personally need to cover), and no idea of duration, it just increases uncertainty. A current, typed police pilot will be comparing rates with what HE can get doing the same work elsewhere. What other people working for PSNI are paid may not be very persuasive for a candidate.
Not trying to be awkward, but helpful. I have flown at PSNI and enjoyed it.
One of the pilots made redundant by NPAS might not have found a place yet, but I would not hold your breath?