My Mum was illiterate, and after having us she worked in a school kitchen (she’d had jobs before having children on a factory floor, then worked her way up to a charge hand position). This was around 1976.
She was a GA in a school kitchen, as one of 15 kitchen hands in medium sized primary school.
It was pin money to help pay for nice things; Dad was a rep on £17k so paid all bills.
Mum taught herself to read - but it took years.
When she started in school meals, she didn’t need to read as there were head cooks & assistant cooks to do that ‘hard stuff’ as she called it. In her 44 years of service, kitchen staff (albeit in a school half the original school’s size) had be pared down so hard that, still as a General Assistant, there were only 3 staff (one for only 2 hrs a day) to run that kitchen - where 90% of the 310 roll had school dinners.
As the years progressed, GAs had to be able to read to prepare food, read allergy information, go on formal courses with written homework & exams, and had to be able to step in as cook at times if her boss was away. Even so, that gave her a maximum income of 4 1/2 hrs a day at minimum wage. When she left to retire last year, it took 6 months to fill her job as people needed to be earning more in order to keep their basic income guaranteed so they could pay basic costs of living.
There just aren’t these type of low to no skill jobs out there anymore. She was well motivated to learn to read, but even then it took years. And there is still a huge stigma in not being able to read.
I don’t think many on this board understand the true struggle of those that are disadvantaged by learning difficulties or illiteracy. Even a GA job, in school hours, requires the ability to read. There are no factory jobs, public transport is not only expensive but shockingly poor. Even fruit picking or food production facilities require the ability to travel miles (or out of town). If you can’t drive (or can’t afford to drive), or there is poor & expensive public transport, then that job is out of reach to OP’s client.
Couple that with a lack of wraparound childcare & even the most basic of unskilled work is untenable.
Sadly, my Dad is in a care home (unfortunately, we’re in his last few hours, it may be why I’m pretty riled at posters’ ignorance right now). The amount of paperwork & care plans vital to his well-being need basic literacy in order to perform their jobs!
I don’t have answers to provide a solution. But there are an awful lot of (allegedly) literate people who’ve replied on here who haven’t read the OPs posts, or must think that just because there are a plethora of jobs available then that means there must be a job for everyone, because the real world isn’t like that.