Kitchenroll I think it's perfectly ok to not understand and also, if this doesn't affect you, to have the attitude of 'everyone is facing cuts, why shouldn't disabled people.' Thank you for asking questions and trying to find out more.
If I can explain some things - the reason disabled people shouldn't have to shoulder the cuts is because 1 in 3 disabled people live in poverty and if you have a serious enough disability, you don't have any way at all of getting yourself out of that. You might have all sorts of degrees and qualifications and experience but it won't help you. Chances are you will have run down your savings paying for medical aids (things like wheelchairs are vastly expensive - think anywhere from £2,000-£30,000 and no one pays for that for you. The NHS offers vouchers worth £200 towards the cost, or did the last time I checked), transport costs, carers (social services won't pay for mine. I have to, and she is expensive. I don't get nearly as many hours as I need because DLA doesn't cover it) If you are living in poverty, are ill long term and can't work and don't have enough money to actually cover the costs that emerge due to your health, how can you afford to lose more? You shouldn't have to, it's as simple as that. As a society we must protect our vulnerable.
This issue is especially galling when you think of the vast sums it's going to cost taxpayers to have everyone re-assessed for PIP (which is replacing DLA) and the huge percentage of appeals there will be when PIP finds people inaccurately fit for work. Appeals are expensive. Plus there are all the extra benefits that will have to be paid because people who are in work now thanks to DLA (e.g it helps them pay for transport to get to work because they can't take the bus) will have to give up their jobs. Plus there are people like my carer who will lose x hours of work a week because people like me won't be able to afford to pay them anymore. So more people on benefits thanks to that. Taking away DLA is going to cost the tax payer. It won't save them money.
You write 'but how do I as a lay person know that they understood the changes fully and were able to make an informed disagreement?' I would urge you to read even 5 pages of the Spartacus report. It is very clear. It would show you that disabled people (or many, many of them) understand every change and are terrified of the outcome. There are many very educated disabled people. I have a first in my degree. I went to Oxbridge. Lots of people only become disabled later in life. Your question makes me realise how successful the press has been in portraying us as 'Shameless' scroungers who sit there in filthy clothes, smoking, and showing no interest in anything that goes on in life.
I sincerely believe there are going to be a number of suicides if DLA is abolished. That's how scared people are. What happens if, like me, you're genuinely too ill to work (but desperately want to!!), but a government agency/private company say 'we find you well enough to work' and then you have no income and aren't eligible for benefits because when you apply to them are told 'but this form says you're fit to work.' Seriously, what happens? How do you live?
Again, thank you for asking questions. Ignorance, or lack of knowledge is fine if you do something about it.