I have, in the past, refused to pay cash for a discount. I would never accept a quote from a build who *up front* declared discount for cash in hand.
Good.
And you know why?
It is because the main drivers for the black economy are mostly the customers who actively ask for a discount for cash.
Traders are either put in the position of accepting that deal or risking losing the business to somebody who will.
And this isn't just about tax either
Remember this?
https://www.bbc.co.uk/news/uk-england-bristol-38080743
Aggregate transport is the bottom of the pool for the haulage industry. You are transporting a low value commodity and the customers will beat you down to the lowest possible cost.
"Hell Drivers" is no different today than it was back in Stanley Bakers day!
I would risk a modest wager that this was mostly a cash in hand business too. and as far as the bad practice and the resultant accident was concerned. I reckon that the clients who demanded, and expected, a lowest price cash deal were just as responsible, if not rather more so, than the crooked operators.
I recall ages ago posting a thread suggesting that asking for a discount for cash should basically be regarded as an incitement to commit tax fraud and that the revenue should be carrying out stings to trap crooked customers rather than crooked traders in order to try to stamp out the practice.
Of course the responses were mostly howlws of outrage, hence my sugestion that "Most" people are total hypocirts regarding this issue.
After all, who is actually evading the tax?
Now, this wont' always be the case, but consider the hypothetical position where the trader gets the same money at the end of the week whether he does a £10,000 for cash or a £15,000 job all above board. The person who has effectively evaded paying the tax is actually the client not the trader!
Like with the lorries, in many ways the clients are more guilty of evasion than the trader is since they are the ones that are getting the benefit from the fraud! (The traders only advantage is the ability to get work that would likley go to somebody else if they didn't want to work for cash and were therefore unasble to give a best price)