This grinds my gears. I'm a part time at my office (govt contractor), and do more work in 20 hours than some others on my team do in 40. Restrictions on firing underperformers put us in the position of "needing" 40 hours in the workweek.
What’s disappointing is wasting that time on social media, when those extra 8 hours could be to improve a process, do some self-learning, mentoring, research… at least, that’s what I do if what I need to get done doesn’t fill the week.