Lack of skills required by employers, lack of ability to work, lack of ability to get to work.
In another comment, you mentioned that lacking education won't prevent you from getting a job washing dishes. This is true. However, I bet there are a fair number of people out there who simply can't or don't know how to wash dishes. It's almost inconceivable, but many of the skills that we take for granted, like knowing how to wash dishes, or knowing how to apply for a job, or knowing how to take a bus, are learned things that not everyone gets educated about.
Bullshit. None of your examples hold any water. They teach you how to wash dishes on the job. The person in the linked article was obviously savvy enough to know how to work the system for better benefits I'm inclined to think they are lazy rather than simply ignorant. Not knowing how to ride the bus? Are you kidding me? People will even help you fill out a job app if you can't read.
