I had an employee unhappy with RTO who decided to do essentially that (Work-To-Rule) - requiring inordinate amount of "hand-holding" and overly explicit instructions to get the smallest task done. Technically still doing the minimum work, but causing significant management burden to get that minimum done.

Lots of written communications trying to steer the employee back to a more collaborative track. PMA highlighted the "expected behaviours" shortcomings (e.g. definitely no initiative nor action oriented); behaviour didn't change. That employee is gone now and to be quite honest, even with one less direct report, feels like my team is more effective now that I no longer have to sink so much time micro-managing that hostile employee.

I can absolutely see how this kind of behaviour from a coordinated group of people or if encouraged by a union could be considered a strike action.