Sky News 
July 24, 2012
A Treasury minister has hit out at households who pay tradesmen in cash, saying it is “morally wrong” as it helps workers avoid tax.
Exchequer Secretary David Gauke said: “Getting a discount with your plumber by paying cash in hand is something that is a big cost to the Revenue and means others have to pay more in tax.
“I think it is morally wrong. It is illegal for the plumber but it is pretty implicit in those circumstances that there is a reason why there is a discount for cash.
“That is a large part of the hidden economy.”