It's alarming how often society seems to hinge on people being in the same place at the same time, doing the same things. The drawbacks of this are immense: infrastructure has to be overprovisioned for any bursty load pattern and being inside of a bursty load pattern results in higher waiting times and isn't a pleasant experience for everyone involved. Hence it's important to investigate why this happens and whether this is always required.
Have you heard of
TV pickups? Whenever a popular TV programme goes on a commercial break or ends, millions of people across the UK do the same things at the same time: they turn kettles on, open refrigerator doors, flush their toilets and so on. This causes a noticeable surge in utilization of, say, electric grids and the sewage system. As a result, service providers have to provision for it by trying to predict demand. This isn't just an academic exercise: in the case of electric energy, generators can't be brought online instantly and energy can't be stored cheaply.
In the case of the Underground network, there are times on some lines where trains arrive more frequently than every two minutes (pretty much as often as they can, given that the trains have to maintain a safe distance between each other and spend some time on the platform) and yet they still are packed between 8am and 9am. Any incident, however small, like someone holding up the doors, can result in a knock-on effect, delaying the whole line massively.
Why are people doing this to themselves?
The weekend was a great invention (although Henry Ford's reason for giving his employees more time off was that they'd have nothing to do and hence start buying his own, and other businesses', goods). But does the weekend really have to happen at the same time for all people?
Some of the phenomena governing people's schedules are natural. It does get dark at night and people do need light. It gets cold in the winter and people need heating. But the Earth does not care whether it's the weekday or the weekend, a Wednesday or a Saturday. And yet somehow the society has decreed that Wednesday is a serious business day and any adult roaming the streets during daytime on that day might get weird stares.
Expanding on this, do working hours have to happen at the same time either? People naturally need rest, but what they don't naturally need is to be told when exactly they can work and rest. And in some types of work, like knowledge work, being told when to work is not necessary and even can be harmful.
In professional services, in most cases, the client doesn't care when the service is being performed. The client wants a tax return to be prepared: they don't want the tax return to only be prepared between 9 and 5. The client wants their investments to be managed: the investments don't need to only be managed between 9 and 5. And so on. Fixed work hours make no sense since it's not time the client is buying, it's the result. Knowledge work isn't predicated on people having to do it at the same time or even at a given time.
The fact that everybody has to work fixed hours hails from the Industrial age assembly line thinking (in fact, the term "line manager" is still used in the UK to refer to one's boss). If one part of the assembly line is missing, the assembly line doesn't work. Hence the management has to make sure that all parts of the assembly line have finished their sandwiches and are in place for when their shift starts. The whole shift also has to get their days off synchronously, as it can't function at all after a critical mass of people has taken the day off.
This is in no way an argument for longer working hours. If a person has exhausted their working capacity for the day, what's the point of holding them in the office until a given hour unless they're in a role that requires that? Some people work better when they have a set goal and some time to achieve it, to be used at their discretion. Some people work in bursts, where the output of one day can overshadow the rest of the week. Mandating fixed hours for knowledge workers means they aren't as efficient as they can be for their employer and further suffer from the utilization peaks that they themselves cause.
