When I worked in the game industry, basically everyone only worked like 4 hours a day during a normal 8-9 hour day.
During crunch, we still only actually worked 4 hours a day, but you had to be in the office for 12+ hours.
Now I run a hobby shop, and we usually only have 2-3 employees on shift at once. We can knock out everyone's work for the whole week in 2-3 hours.
But we have the same problem. The owner expects us to work every second, so everyone just ends up stretching that 2-3 hours out so they don't get reprimanded. We're not actually doing any more work. We are just under more stress to make that work last while looking busy.
No matter where I go, there's someone at the top who wants asses-in-seats more than actual productivity.
The best part of it all - I once convinced the owner to try out a system of rewarding productivity over time. I asked him to make a list of tasks to complete in the week - what he thought was an appropriate amount of work - and when we completed it, we could basically do whatever we wanted. Which, running a game/hobby store meant playing Warhammer, Magic or D&D (while still actually running the shop). The first trial week, we knocked out his entire weekly list of tasks in two hours. He went ballistic and accused everyone of being lazy, since obviously we could do more work - despite the fact that he's the one who made the list of tasks. The following week, he more than doubled the workload. We still finished in one day and had six more days of leisure time. The third week, he basically just made a pie-in-the-sky wishlist of nonsense to keep us busy. We finished it in 3 days. And... that's about when we ditched the whole idea. Management can never be happy that all the work is done, no matter how much you do, if you have any free time whatsoever. He constantly viewed any downtime as us 'stealing' from the company because we were not actively working on tasks/side projects/etc. Nevermind that if a customer comes in while we're playing anything, we pause everything and go help/talk to them. Nevermind that the store was making more money, better customer reviews, cleaner, more organized, etc. All that mattered, is that you look busy your entire shift so that management is 'getting their money's worth' of your labor.