I think any change to the system is going to be extremely difficult. My son receives DLA and at 7 is largely non verbal autistic so I have a little lived experience too.
But for what it's worth my thoughts are that people say that DLA/PIP is for the extra costs associated with a disability but I think it should link much more closely with what costs there are associated with the disability.
That would cut the funding to nothing for some conditions and increase the funds available for other people much more in need of it.
I'm coming from the context that anybody that can't work is entitled to universal credit and help with their rent and council tax so it is specifically whether they need extra money in the form of DLA or PIP because there are extra costs associated with their disability.
So personally I would wonder if someone is suffering from depression/anxiety has extra costs relating to that condition over and above another person. What are the £££ costs of being depressed or having anxiety. If the need is for therapy I think it would be a better use of public funds to pay for the therapy direct as that is more likely to be time limited.
Someone earlier in the thread mentioned they suffered from agoraphobia and anorexia and again I wonder what are the day to day costs of this that are higher than another non disabled person? I accept that if they are very poorly they may be unable to work and in that case they would be entitled to universal credit. The person may at some point need in-patient treatment for anorexia but that would need to be funded direct rather than privately.
I think if we could then free up some money to support people running life saving equipment, in need of keeping their house warm due to being very ill/end of life, lots of washing due to incontinence etc better.
My own experience with my son - he won't ever be able to work and his needs are high but I did question to myself when he was 4 or so whether he cost us more than any other 4 year old. The main cost of our child is not being able to work more as we can't use mainstream childcare around school like we did with our older child - he would need 1:1 childcare. So our household income is lower than it would otherwise be (as we only work in a tag team of one or the other at work) but I'm not sure DLA is designed to compensate households for being unable to work as much as they would otherwise. We don't get universal credit but some families would if their child's disability limited their earnings enough.
I do also notice that when we go out swimming, or to a local zoo we have a membership for, that a high proportion of the children also have disabilities. I think the reason for this is a mixture of parents of disabled children needing to keep them busy and themselves sane as their child can't just play with peers or play nicely around the house but I also think some of it is that some people receiving DLA can afford to take their kids out more often. Families without it often can't.
When my child gets older and leaves school the support we could probably benefit from most would be some hours of care for him to give us a break from caring and his DLA/PIP wouldn't run to a lot of hours of that. I guess we hope that the local authority will pay for a day centre or similar for some days a week and I see through my work that the number of days provided for people has been cut down for many people since Covid.
It doesn't help that out of work benefits for adults without children are shockingly low. Anybody would struggle to survive on them so I think if we could cut the number of people receiving extra money for conditions that don't really have much of a cost it would be great to redistribute that to upping out of work benefits for adults without children which really are dire. I know we need to save money as a country and re-spending the money doesn't save it but it cushions the drop for people whose money is cut and gives more people on out of work benefits a fighting chance of managing.