Could be expensive....most units' police observers have the discretion to turn down tasking requests on the grounds of being inappropriate use of the resource; we turn down about 75% of requests that come in because there simply isn't an air support angle to the task and I doubt we're exceptional.
If you remove that discretion and offer what is essentially an airborne CCTV service - phone rings so off we go - then the budget would be out of control in a few months. True, the camera/radio operators might be a little more technically skilled but that's not really the point - it's about appropriate use of the resource.