Many years ago I was working in X and needed a place to stay for 2 weeks instead of the drive back home every day. I found a B&B which seemed to suit and the people who ran it were very hospitable and chatty.
When I left we kept in touch regularly and I would visit for an afternoon or take them out for dinner.
This went on for many years and I got to know them very well indeed.
Suffice to say they were receiving their pensions and not declaring their second income. Whenever the rare visitor from the DWP arrived, to all appearances, it looked like a large comfortable family home. The marque car had been put in the pub car park. The many many wines and spirits hidden and dining tables put down and removed to a shed.
The DHS visitor was made a fuss of with tea and home-made cake and when he went, it was all put back again.
Their grocery wine, spirits and cigarettes bill had to be seen to be believed. The amounts of cash (they only dealt in cash, no receipts) taken to the bank was in the middle hundreds, weekly, yet they were bankrupt...well, let's say, they had an arrangement to pay a nominal sum to their creditors of £1pm to each of the 8.
Besides their pension they received pension credit, plus of course, the usual extras.
The sad thing was that they laughed at being able to fool the DWP and their creditors and made no secret of living high on the hog courtesy of the government.
The bank never wondered how they were getting all the DWP payments plus another source of income but they'd been banking there for so long they were treated like family.
When I found all this out, I broke contact without telling them why.
I would never in a million years have thought they would be complicit in such goings on but you just never know how dishonest some people are, right under your nose.