The care worker discussion is a bit odd.
Care work is one of the main jobs people on UC who work, are doing, albeit part time.
If you are a care worker and you do 20 hours of shift as a single parent. Its not always as easy to find 17 more hours as you first think. the 17 extra hours available might well be outside of normal childcare availability. A lot of care work is anti social hours. My mum did it and it involved driving house to house, very early in the morning till late at night, night shifts, weekends etc and she had to run her own car. She claimed milage but it didnt cover wear and tear.
Then people say, well dont be a carer then. But thats the job they have qualifications for and experience in.
They cant win they should do care work, but then when thier children continue existing outside of 8-6pm they shouldn't do care work.