Tax specialist Miles Dean, of Milestone International Tax Partners, said those who paid cash in hand were guilty of fraud rather than tax avoidance.
What David Gauke fails to understand is that paying the plumber, builder or candlestick maker in cash to avoid the VAT element is fraud.
The provider of the services is obliged by law to charge VAT - if he doesn't and the customer agrees to pay cash without an invoice the two have colluded to defraud HM Revenue and Customs.
This isn't tax avoidance, it is fraud.
More top news
Weather set to improve with plenty of sunshine by Saturday
Tony Davis was the first civilian to reach Pc Palmer after he was stabbed during the Westminster attack.
Defiant Londoners put on a show of solidarity for the victims of the Westminster terror attack at a vigil in their honour.