I think you mean, a ‘gubby’ job, where a few blokes in their ‘spare time’ are doing it for cash. Sod H&S and jets not worry about paying any tax or insurance. Depriving the government if much needed revenue to fund the basdive discuss usages affecting the country. Illegal, fraudulent practice that is usually held up by many as laudable enterprise. Best yet, you get to claim it’s ‘greedy’ true entrepreneurs who put everything they have on the line to offer employment and build much needed houses.The latest Big Builder Acrows - much less expensive than the proper traditional ones and if a serf should be squashed by any collapse, there are plenty more to be had as none of them need to be actually qualified to lay bricks these days! (See Yosser Hughes for details).
Also, if the house falls down it makes more repair bills for house buying guls to pay. Big Builder needs his big black bottom line as the latest yacht has got a bit tatty.
Efficiency, that is (of the profit-making).