These days in the UK it's called "Universal Credit" with a changeable rate that's constantly being monitored depending on your needs and what you're doing to satisfy certain conditions.
Depending on what your savings are, if you own or rent a place, if you have dependents, if you're married, etc. All change how much income you get from it.
Also, if you're claiming because you're on the job hunt there are things like regular appointments with a job coach and a journal to keep filled out with what you're doing to find work. They try to help you (depending on how jaded and senior the job coach is), and once a certain point of time is passed they will roughly tell you to stop looking for the job you want and just to take any basic level job. There's stages to it. Stop looking for permanent jobs at the next stage, start looking for short term contracts, start looking for lower level roles, start looking for the job as a shelf-stacker at the local supermarket...
There are all sorts of hoops to jump through and evidence you need to show to claim more or other benefits. But yes, there are people that have managed to steal small fortunes, but the struggle to get the basics can still be there for the majority of people going through the process.
If you're claiming for sickness reasons, again, there needs to be evidence from the Doctors, x amount of time to recover, if its a permanent thing there can be continuing evidence needed. There can also be issues depending on how much NI (national insurance) you have paid in yourself over the years before you start to claim anything.
It is a deeply threaded morass these days.
If anyone is reaaally interested: https://www.gov.uk/universal-credit