Following recent criticism of the Living Wage calculations by Brian Scott, Charles Waldegrave, one of the principal creators of the methodology, responds here.

http://www.scribd.com/doc/207883123/Waldegrave-Responds-to-Living-Wage-Critique

To quote his summary:

This paper addresses the conceptual basis and evidence of Scott’s critique. It demonstrates the critique lacks an informed understanding of the definition of a living wage, confuses market wage rates and welfare transfers, selectively applies international comparative data, consistently misapplies the use of Statistics New Zealand’s Household Economic Survey database and provides no evidence for his assertions about the impacts on morale and productivity.