Use D/deaf people to monitor services (it’s a no brainer)

Why don’t organisations and companies use D/deaf people to monitor their services (like, pay them)? It’s such an obvious thing to do and yet you rarely see it done (nless the deaf person is so heavily disguised we don’t see them anyway). I know D/deaf mystery shoppers exist and a good thing too – but I am talking about staff who think they know but so obviously are missing what they are seeing. I went to an arts event the other day where 20 people turned up – a fantastic showing in a small gallery outside London where the event had not been well advertised. Great. I got an email afterwards from one of the staff saying how pleased they were. I did not have the heart to say “Well, actually, seventeen of those people were hearing”. Now, there is absolutely nothing wrong with 17 hearing people turning up – after all, if they are learning signing (2 were trainee interpreters) then they need to “get out there” which they were certainly doing. It is that a service is being created for a group of visitors (D/deaf people) who were not actually there, and the staff have no inkling of this, and therefore will not notice what needs to be done so the service gets to the people it was intended for. (a bit like benefits not reaching the people they were intended for, but that’s another story). Why don’t people budget (when they are doing their grant applications for example) for a D/deaf monitor who could give such helpful and careful guidance to the organisation. I can think of several people who would be great at this. Surely it’s a no brainer?