This reminds me of malicious compliance at my work. There was a dude who was always early to work, but that actually allowed the company to be more productive since he was a manufacturing operator whose machinery took around 20-30 minutes of preparation and warmup time, and by the time he was ready, rest of the personnel that works down the line was ready to work too and didn’t have to wait around. He sometimes clocked out few minutes early and got written up.

After that, he was always at work at exactly 6:00, not 5:30. The company sure saved those 5 minutes