There are two other trends that worry me more. One is visible in the freezer section at the grocery store; a "half-gallon" of ice cream is no longer actually a half-gallon. Many other food items have shrunk. The article's example of lighter buildings is what I view as the same category, something blogger Yves Smith terms 'crapification.' We've now had at least two generations of spreadsheet-wielding MBA's optimizing corporate costs to reduce what is spent on materials and labor. Evidence of their success is showing up across the economy, and politics, and society at large.
The other trend is money supply; One of the chief problems leading to the 2008 financial crisis was that much more credit had been extended than could ever be paid back by those to whom it was loaned. The 'solution' was to have central banks 'pay back' the loans that never should've been made. That put a lot of credit in to the economy, which shows up as economic growth. I'd like to see an analysis of 'economic growth' where the contributions of resources and credit are accounted for separately.