“In short, leaving aside purely political disputes and socio-economic disputes, all disputes that arise on the shop floor that concern the employment relationship constitute matters of mutual interest.  This wide interpretation of the phrase is, of course, in keeping with the fact that constitutional rights (in this case, the right to strike) must be construed broadly”.

Public Servants Association v Department of Home Affairs (JR657/2015) [2015] ZALCJHB 326 (22 September 2015) at para 19 per A Myburgh AJ..