Budget Responsibility and National Audit Bill [HL]

I intervene because I think that the Minister is winding up on this amendment. Why is it assumed that the staff of the OBR have to be people seconded from the Treasury? It is not as if the world is short of economic forecasters. One has only to look at the list of economic forecasters in the summary which the Treasury produces. Why do we feel that we have to second people from the Treasury rather than recruit them on a competitive basis?