With great benefits? You can 100% live on that as a single person in your mid 20s.
Especially considering how many of these teachers are women with children who have a job literally designed to be home during the time that children arent in school.
Almost anyone with a decent high school education and access to the materials could step in and educate kids k-12.
The hard part about being a teacher is dealing with spoiled brat kids who refuse to listen and hinder the education of the other kids around them.
Being a teacher isnt a great job if you're looking for great pay. But the hours, vacation time, and scheduling around being a parent makes it hands down the best job available. Which a very high percentage of teachers value very highly, and I would be willing to bet given the chance to work the 10+ weeks they usually have off for a 20%+ bump in pay almost every single one would refuse.