Under the terms of the Local Government Superannuation Scheme (LGSS) a person's pension contributions and benefits are based on the pensionable pay appropriate to the pensionable local authority post. Earnings in respect of a position, other than the person's local authority pensionable post, do not count for pension purposes and, equally, contributions are not payable in respect of such earnings.
I understand that the person referred to in the question was employed by a local authority and was seconded to a post, at a higher level, in another public service organisation up to the time of retirement. In this regard, the local authority correctly determined his superannuation award based on the salary applicable to his pensionable local authority post. It is a standard feature of public service pension schemes that a scheme member on secondment is pensionable in his/her substantive post and I am not aware of any proposals to amend this principle.