Working to rule means doing exactly what your job requires. Nothing more. No unpaid overtime. No covering for three people. No 12-hour days because leadership didn't staff or plan properly and sent jobs to inexperienced and incompetent people in India. They chose them, let them handle it.
If the system breaks, let it. Management built it. Let them fix it.
We deserve balance and respect. We will not ki-l ourselves for a company that will discard us at the first opportunity.