Nid oes unrhyw un wedi herio’r dystiolaeth hon o ddifrif; yn wir, mae’r dadansoddiadau mwyaf credadwy a gyhoeddwyd gan eraill, gan gynnwys y rhai a gyflwynwyd i’r Cyrff Adolygu Cyflogau gan Lywodraeth yr Alban ac i’r Office of Manpower Economics gan Gynulliad Gogledd Iwerddon, wedi dod i gasgliadau digon tebyg.
There has been no serious challenge to this evidence; indeed the most credible analyses published by others, including those submitted to the Pay Review Bodies and the Office of Manpower Economics by the Scottish Government and Northern Ireland Assembly respectively, have reached broadly similar conclusions.