Also- those who do not claim themselves benefit.
My sister manages a nursery, the best most reliable staff are parents: but nursery worker wages are not enough to raise a family on, they claim tax credits. Working families often rely on these low paid workers to work themselves, or indeed other types- carers to look after Mum, a cleaner, TAs at school- whatever.
Very few people are completely individual units with no need for anything in terms of help, just becuase on person does not claim does not mean they do not rely on those who have to.
And yes, shove some SN childcare provision our way and I will work, there's an agency wanted to take me on in fact but couldn't stretch the hours (post grad level work too, looking into possibility of cover temp work with them). But SN childcare would cost more than I earned in most jobs (a friend who cares for 2 asd kids as a specialist nanny gets 30k PA in Wales), and state help to cover it would cost far more than my Carer's Allowance.
And as ds1 is violent I suspect no amount of subsidised childcare woul help, so people wishing for all benefits to be taken away would see me homeless I guess. Simply for the fact DH has a genetic fault we knew nothing about until years after outr family was complete, by which time we'd both lost our home and former careers. Cheers for that, yes. And I presume they'd see ds1 starve as a disabled person?