Having been on the dole for a couple of months between graduation and my graduate job starting I worked a wee bit at the weekends cash in hand to try an make up a bit and I can assure you the extra hundred or so a week on the side still wasnt enough. I couldnt have afforded to put petrol in a car never mind acquire one, paying rent was a major stress never mind pay electricity, get oil for the house.
I dont approve of people manipulating the system to get money thy arent entitled to (e.g. incapacity when fully fit but just lazy) but to grass on people doing a bit of work on the side to make up a shortfall just stinks of petty selfish self importance
Edit: forgot to mention i was raising, and still am, a youngun at the time