Where did you get that idea? As a farmer, I see endless work opportunities where the employers would just be happy to have someone show up. It seems most aren't willing to do the work though[1]. Which is fine. It's not everyone's cup of tea. Even more comfortable or 'higher status' work is also easily attainable with a bit of effort.
However, none of this addresses the reason for the situation they are in, and I don't mean just because they are lazy like you insinuated in another comment. There are a number of reasons why some people struggle in the workplace and it is related to the same reasons why they struggle in school, or even learning on the internet for that matter. To pretend that we can just throw education at this problem is misguided. Lack of education isn't the problem.
[1] https://www.washingtonpost.com/news/wonk/wp/2013/05/15/north...
Also, I say "education" in quotes because today in an age where anyone can learn anything on the internet, a lack of degree does not mean a lack of education. A degree just shows you're willing to be compliant and follow an arbitrary education system for years just to improve your social status. It doesn't mean you're unable to learn.