I highly recommend this post by Mary as an insight into the stupidity and failings of the benefits system for those disabled people who are doing exactly as the government dictates and attempting to work.
Once again, stupid is as stupid does.
PS: I don't mean Mary is stupid. Obviously. Anyone who can navigate the benefits mess must have at least double the IQ of your average politician.
PPS: I don't mean Mary is only twice as clever as your average politician, for starters she can write in full sentences