Do you demand the same from your dry cleaner, your surgeon...etc?
I think surgeons are already recording their work. Often patients, if they are conscious, can watch what happens. Regarding dry cleaner they can do very little damage. Parents do monitor new baby sitters until they are satisfied that they can trust them.
I just realized what's bothering me about this, Auzie. No disrespect, but if I worked for Tesla as a tech & they required me to wear a camera while working ... I'd quit. It indicates such a lack of trust. Best case, you will have a tech that only does exactly what they have to do and nothing more. Worst case, you'll have some jerk who was willing to take the job, but is actively looking for a way to defeat the camera.
People have pride in their work. Requiring them to wear a camera just screams 'we don't trust you'. I've built up a good relationship with the techs that work on my car. I would never insult any of them by asking them to wear a camera.
But now that I think about it, consider how much damage a chef could do to public health by contaminating an evening's menu. Everyone could get sick a day later and the culprit could be long gone. Or deny it was them, but rather maybe the dishwasher that left toxic residue on the serving plates. Or the line cook. Or just a guest sneezing in the main dining room that got everyone sick.
You see where I'm going with this ... we need to operate day-to-day with some modicum of trust or we will be paralyzed in place. Ask for the replaced part, if you're paying for the repair. Talk to a supervisor if you think corners were cut. But every Tesla technician I've interacted with takes a great deal of pride (which has been earned imo) & would be insulted if it were implied they couldn't be trusted.
Car abuse is quite common and over servicing is quite common because it is so easy to do it and dealers incentive feeds right into it, in case of servicing. There are few example links that Canuck provided
here
Tesla servicing model may be such that cars are less subject to abuse but as the business grows it becomes much harder to control what happens with all the employees that may operate in different environments and cultures.
When there is high potential for abuse, like unmonitored high value goods, then some inbuilt transparency is required rather than offensive. Perhaps technicians do not wear cameras, but any work on cars is better off verified, by a camera or any other creative way.
As for some personal examples, I do not pay for service for many years now but when I used to pay it used to matter. The example I remember, I had few years old Audi, that developed some kind of water leak into back passengers floor space during rain, quite a pool. I took it to few shops and what they told me they would do to my car just scared me. The proposal was total car body disassembly that would take a week, and astronomical charge, in thousands of dollars.
I googled the problem and gave it a go myself. It took me half an hour to take the battery out, clean some leaves debris under the battery, put it back and the problem was gone.