Right. The best example I can think of in the US is Penn Foster which is, obviously, not setting any trends for academic norms. Still, they have very few teaching staff considering the size of their operation and many programs have been relegated to part-time remote working "graders" rather than actual instructors. I imagine they are required for (programmatic) accreditation of their vet tech (for example) program to have actual instructors who can answer questions and help guide students. But for high school math? Just have the computer grade the multiple choice. This isn't a terrible thing, in my opinion, because I like creating efficiency. But if one's plan was to retire young to a beach somewhere and just casually teach their way into six figures from the comfort of their beach chair it might throw a wrench into their long term planning. I'm noticing this "digital nomad" thing is really trending these days and a lot of the ease of it seems to be based on some very odd assumptions about how steady some work is, how much longer it will be a viable option and what one might realistically make doing it.