This cartoon by Paul Thomas from The Daily Express relates to the decalaration by UK Treasury minister David Gauke that paying tradesmen in cash is morally wrong. He told Newsnight that householders who paid tradesmen in cash to get a discount were "facilitating the hidden economy".
A British athlete is standing on podium in London's Olympic stadium. The official says to him, "It's the Olympic gold medal—unless you'd prefer cash instead". The soldiers are there to provide security—a reference to the G4S fiasco, which was the subject of earlier cartoon posts (here and here and here).
A cash-in-hand payment involves payment for goods or services immediately using cash (notes and coins), rather than by cheque, credit card, etc, especially when this is a way for the person being paid to avoid tax. The person paying will often receive a discount in return.
• Have you ever paid cash-in-hand for anything?
• Do you think it is morally wrong to do so?
• Paying tradesmen in cash morally wrong, says David Gauke - video (BBC News)
• How 'morally wrong' is it to pay cash-in-hand? (BBC News Magazine)
• David Gauke calls it 'morally wrong' but even the Prime Minister admits to paying in cash (The Telegraph)