Military Aid to the Civil Powers (MACP) is one of the defence pillars of responsibility. But, that should only be invoked when the Civil Powers are fully manned and overwhelmed by circumstances that they need aid, to provide assistance beyond their established capabilities. MACP should certainly not be used as a back-stop for Civil Servants or public sector workers striking. There are innumerable examples of MACP being properly used, but strike-breaking should not be one of them.