[dazc]

This is true but a lot of labour intensive processes can be done off-site in a more controlled environment.

For instance, partial pre-assembly of mechanical/electrical fittings through to modular kitchen/bathrooms with almost everything done before it gets to site.

Of course you'll always need people to put all of these elements together but the numbers needed becomes less and less.

The certified worker who signs everything off used to do almost everything himself, we are now moving to a situation where this is almost all he does.