Its quite ironic that within the EZY culture of a 'no blame' work ethic (except captains!), introducing performance related pay to aircraft turn around times will only create a serious 'us and them' culture between aircrew, engineers and ground staff. Not a good platform for a coherent efficient team working in one direction.
On the point of dodgy despatchers, how long is there training? Is it anything like the FAA course in USA that leads to an industry standard qualification?