So, there are a lot of things you learn in high school that you never use afterwards. For geography, which was one of my weak subjects, this might actually count a bit less. It is quite useful to know about Pangea and why Dutch soil is weak and why exactly Amsterdam is built on stilts.
But in daily life, I do not think or wonder too much about these things. Something that is very relevant though, is the concept of hidden unemployment. I have already mentioned and experienced enough that efficiency is not held up to the highest standards in my country (watch my washing machine saga unfold and be surprised). This is because with all these people around, we need to give them something to do. Even though it makes no sense or could be done better, faster, stronger by a machine.
I am putting aside the tedious factory work that is still making a living for many people around here. But let us take a look at the slightly less depressing examples of hidden unemployment you encounter on a daily basis here.
1. Parking meters: I do not think I have ever actually seen a parking meter in China. For parking garages, the West of course also still uses human labor as well. You could argue that having people do this work on the streets, provides some slight benefits. They can yell at you to possibly make parking your car easier (or not), perhaps you can bargain for a slightly lower price (probably against the rules) and they can keep an eye out for your car (if they are not sleeping or talking or otherwise not paying attention). Another thing that makes it almost nostalgic to encounter these parking fee people is that you often can only pay cash. Perhaps that is their most important function, preserving a link to the past.
2. Security guards: Sure, the soldiers outside the embassy gates look slightly menacing, those probably would serve some kind of purpose in any event. But with all the security cameras in this country (apparently some 20 million throughout the country) you might think hiring some extra people to make security extra inefficient is unnecessary. Of course you would be wrong. The most fun parts of my day are sometimes walking into building where I am clearly not supposed to be (I explain this technique in more detail here) past a sleeping, talking or otherwise clearly not paying attention security guy and walking right out past him within 10 minutes. But perhaps, they are meant to serve as a secretly rebellious example. That as a security guard, you can be on duty, and probably being filmed as well, without actually doing it. Or even more so, with doing the opposite.
3. Cleaners: It is amazing how much there is being cleaned in this country. Not necessarily with the goal of it actually becoming clean, but merely the act. On the streets there are sweepers on every corner with just a broom and dustpan, then you have the slgihtly cooler sweepers who have their own little garbage trucks and you also have the people in those automated street sweepers. And the streets are also being sprayed once in a while. You have people sweeping streets with dry mops, with water machines to clean the pavement, dusting of handle bars and fences. The end result is a cleaner street than you would expect, but not an environment as clean as you would hope. This might be because sweeping up leaves is not actually cleaning up anything. Or because people keep throwing trash in places that are not trashbins. Or because almost half of the cleaners seem to be 50/60/70+ years old.
In the end, we can argue how much use any of our jobs have. In this sense, China delivers a healthy reminder daily that most of us do not really matter that much. A message, that incidentally fits the Chinese dream quite well.