When investigating a NHS hospital some years ago, Gerry Robinson, former TESCO boss from Mayo, drilled down to find out why there were excessive delays for certain operations. He discovered that an operating theatre was closed every Friday. No-one knew why, but it was "custom and practice". Re-opening the theatre solved the problem permanently.
God only knows what wasteful customs and practices obtain within the HSEs. An hour off to cash a cheque anyone? But you're paid by credit transfer now. Ah yes sisters, but custom and practice dontcha know.