The UK system is something of a mess with perverse incentives. There is 'job seekers allowance' based on seeking work but a lot of people either work and pay taxes or go on disability which you can do by saying you are depressed and the receive income from the taxes on the working people.

The situation makes it quite hard to work if you are on disability and similar which has led the the numbers shooting up

https://www.reddit.com/r/AskBrits/comments/1mxxksa/whats_dri...

If you extrapolate the graph in the link in a few decades no one will work and we'll all live by claiming benefits off each other. UBI might be better.