Good point Wokkaboy: the volunteers are a very important part of any Air Ambulance charity's resources. Everyone would howl derision if the support of a volunteer was spurned so a 'professional' could provide input for all charity events. It sounds like 'Dr.Bleetman' has been swallowing the bull**** of Williamson who no doubt has his own agenda in this regard (he does in everything else).
As for where the cash comes from, he's also spouting b*****ks. I can safely say that the contributions to the charity I'm involved with from corporates or 'sponsorship' are very welcome but both irregular and only forms a small % of total income. These - together with the 'ladies shaking tins', attendance at events, golf days etc etc - form a very important role, both in the funds they raise and in keeping the charity at the front of people's minds. But the real money comes from something much more basic. If Williamson hasn't figured that out yet, I'm not going to be the one to tell him.