This has been going on for years.
Seems in this case it was possibly non working men but i have an example i saw first hand.
When i worked in a factory in rochdale doing summer work about 6 years ago i met some pakistani lads who were living with 20+ other lads in 2 terrace houses knocked together. The roof was used for sleeping space, they all worked in shifts, shared beds and put money in for a big ever cooking pot of rice/curry etc.... shared bills and so on.
They seemed happy.. all wages left were sent home and they said if they lived like this for 2 or 3 years they could go home to the small village and live like a king for the rest of their lives!
This is why immigrants who live like this can work for below min wage. They do not have to live "properly" like we would expect to, so can work for far less wages.
This is one of the reasons why so called "lazy english" will not or cannot do the same job for the same money. ( of course there are lots of lazy chavs but this kind of thing does happen, and id wager it happens a lot more than people would assume )
If we all lived 20 to a house we could i am sure!