Cash In Hand

A question about : Cash In Hand

I pay tax and NI so I think these trades people who get cash in hand and don't declare all their earnings are well out of order. Why should a plumber or similar only declare 60% of their earnings and how many offer their customers a receipt without having to be asked over and over?

Best answers:

• They shouldn't.
  People break the law. Some of them get caught and are punished for it.
• .......random