I would say it is because of the Baumol effect. Construction is not massively more efficient today compared to a century ago, while salaries have massively inc

I would say it is because of the Baumol effect. Construction is not massively more efficient today compared to a century ago, while salaries have massively increased. https://en.wikipedia.org/wiki/Baumol_effect https://en.wikipedia.org/wiki/Baumol_effect