The previous government had, I thought, tried to reform the system to make it easier for people who were disabled to get fair access to the workplace by offering them the support they needed, and that it was an assumption that disability in itself should not be an insurmountable hurdle to taking a full role in the world of work. It has been twisted round by the current lot to make it clear that the disabled are expected to work full stop as they don't deserve something for nothing and are a bunch of scroungers.
I have a friend who was told he was fit to work having been almost paralysed after surgery to halt the spread of malignant melanoma - sadly unsuccessful and he has been told he has 6 weeks left if he's lucky. This was because he still had the capacity to do simple tasks in the interview on that day. They look only at capacity and not the diagnosis.
When I filled in a demo ATOS form on line as if I was my disabled son on a good day (he is currently only 13 - I was curious and testing out the system) he didn't score many points and appeared to be 100% fit for work. However, he regularly spends periods of 2-3 weeks, several a year, in hospital with a chronic and life shortening condition that requires hours of daily treatment even when he is well.
Problem for him is that when he grows up he will be very keen to work and have a proper life (during his good spells) but I cannot see how this would be possible under the current system! People with fluctuating conditions appear to be particularly hard hit. When he fills in the form, does he say how he is when he is ill (oxygen, IV meds for 2-3 weeks, plus loads of other treatment) or tell them what he can do when he is really well? He is usually fairly fit after a spell in hospital followed by a couple of weeks of recovery at home (but still on hours of home treatment to keep that way) but it doesn't last long. When he is well, he will be able to run up the stairs and do a somersault into the ATOS office.
The drive to make sick and disabled people work does not seem to come with the support to make it feasible (such as very detailed and targeted 'access to work' help that used to be possible) and that level of support is very expensive and could potentially cost more than keeping someone home 'on the sick'.
By the way, you have a right to have an official recording of the ATOS interview made, although most people don't know this and there is a shortage of equipment (not allowed to use your own). Can also request a home visit - if you can get up the stairs to the interview you are fit for work lol.
Anyway, agree with Pootles and others, the current government have put the 'N' in cuts.