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. 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.