If

building contractors spent less time constructing works of scaffolding art, would they be able to finish the actual building quicker?

Wandering up and down Cheapside has brought to my attention the wooden constructions which now appear as standard around the base of scaffolding. Work men cutting sheets of wood to fit the spaces. Then they paint the wood. Blue. And then they paint it again. Reddy orange. All very colourful - but why? Not only that but it takes up more of the pavement...