My mum used to do adult literacy evening classes when we were little for extra cash. She had loads of stuff at home for adult learners which were very basic - as basic as that guy was saying he needed.
There were classes (and one to one tuition) at this level back then (1970s). Why not now?
Actually, there are - a colleague runs one at my work, although certainly not enough and I agree, some of the learners obviously needed daily, one to one support.
I found the programme fascinating, and really moving. Reading was the one thing I "got" very early so it's difficult to put myself in their shoes. I suppose if you were dumped somewhere where all the writing was in arabic or japanese it might give you a slightly similar sense of disorientation and panic.