I think this is really interesting.
To declare my interests upfront - I'm disabled due to an accident. I have twins. One is autistic and one is autistic and has adhd as well as other physical disabilities.
There's basically two perspectives on this.
One is the family responsibility perspective. So in the same way that many people feel that dads who have left their wives and children should support them (which led to the setting up of the child maintenance service) many people feel that disabled children should be supported by their family.
Lots of men leave children and don't pay anything towards them. The CMS service has 93% of people paying cms are male and only about 75% of those people pay anything at all towards their children.
Parents of children with autism (or other disabilities) are much more likely to divorce.
www.ncbi.nlm.nih.gov/pmc/articles/PMC2928572/#!po=0.877193
So from the family responsibility perspective, there's an argument that the fathers of these children should be supporting them much more both financially and emotionally.
Personally I think that having a ND or disabled child puts so much strain on a marriage that state support is needed, but it's certainly true that all children do better if able to be with parental figures that they are attached to, and the previous approach of putting them in a state institution at a very young age while preserving marriages was not good for the children and often what would now be considered abusive.
(Link - the state institutions were hospitals and were known as institutions for the mentally defective)
www.qmul.ac.uk/media/news/2017/hss/an-autism-revolution-in-the-history-of-child-development.html#:~:text=Caption%3A%20'Before%20the%201959%20Mental,institutions%20for%20'mental%20defectives'.
In the U.K., over the last 14 years there's been a massive cutting of a lot of the government services that supported carers. Respite went, day centres went, surestart went, a lot of education funding has been cut meaning that children with any kind of disability now find it harder to access both education and any kind of integration into society.
Pretty much by definition, disability means you can't access services intended for non-disabled people. Expanding that so that disabled people can costs money and the focus over the last 14 years has been on saving money and cutting back the state.
So respite was replaced by personal budgets. So in theory disabled people (adults) get money which they can choose how they spend. But in practice it's hard for them to get carers, it makes them an employer etc and it's not really been a success.
With disabled children, in the U.K. the legal responsibility is in the parent to educate their child. So it's very firmly a family responsibility. State education in mainstream simply isn't suitable for many disabled children which is why so many drop out.
I don't have any answers. My DD dropped out of state education and it caused a massive strain on both me and my marriage. But I'm not sure what else could have been provided.