Bob Keslake and Politicisation

The Permanent Secretary of the Department of Communities and Local Government has been criticized for making some politicised comments on a recent Public Accounts Committee report.  It follows suggestions over the past year that he has lost the confidence of ministers.  Eric Pickles is usually very sensitive to any suggestion of local authority resources being used for party political purposes.  Should he not be concerned by political interventions by his own head of department?