A reader has commented there:
In my authority The Housing Benefit Review means random cases are visited to see if the circumstances match their claim details. There is no investigation as such. The visits are unannounced. I have never seen one which queries very low self employment earnings (and I've seen a window cleaner declaring £6.00 per week profit). So its a token effort.It's a token effort indeed. They don't want to rock the boat by "discovering" that benefit fraud is several times the official totals.
Other people working in benefits have all commented that fraud is a lot higher than official figures.
Risk Based Review means high risk cases are checked after 3 months and bank statements are requested but that's only declared bank accounts and I see a lot of people being paid in cash.
Do senior officials know they are conniving in a cover-up?
Of course they do.