@vampirequeen
No, I don't, but I've also seen first hand how it works.
I was unemployed for two years after a breakdown. I didn't claim ESA, although I could have done, but I was sent on some of the courses that ESA claimants attend and obviously I chatted to the other participants.
Obviously there are some people who are far too ill to work ever again. However, it really isn't as black and white as being too ill to work or not too ill. There are many people who could work for a few hours a week, but the system doesn't let them. Many of them actually do want to work. I did, but knew I wasn't well enough to work full-time and not in my previous job. I needed the opportunity to get my confidence back and, ideally, funding to retrain.
Once people admit that they are working a few hours, they fall into a trap. They are considered fit to work and lose their ESA, which is worth about £40(?) a week. That's a considerable amount of money to people living on the edge and, not surprisingly, they don't want to lose it, especially as they will have almost the amount they earn deducted.
There are people who play the system and know exactly what to say at assessments. After a while, they lose the will to look for work and it becomes a vicious circle.
This is where the idea of a minimum citizen's wage would work well, because people could keep whatever they earned on top of any basic wage. That would mean that they could do a few hours babysitting, delivering leaflets, doing data entry at home or whatever. There are loads of little jobs around which don't pay enough to live on, but would give people with limited capability to work some extra cash.