Normal people subscribe on a moral level to use value. Most of us see someone spending money on a gambling addiction as doing something worse than providing Christmas presents for kids, but not because of price. However, our GDP models use the market value basis. Kuznets, presumably, was not amoral, he just thought that our laws would ban immoral activities like gambling, and so use value and market value wouldn’t diverge. But they have.

It’s not just things like gambling or pornography or speculation. A lot of previously unmeasured activity has been turned into data and monetized, which isn’t actually increasing real growth but measuring what already existed. Take the change from meeting someone at a party to using a dating app. One is part of GDP, the other isn’t. Both are real, but only one would show a bigger economy.

Beyond that much of our economy is now based on intangibles - the fastest growing sector was software publishing. Is Microsoft moving to a subscription fee model for Office truly some sort of groundbreaking new product? It’s hard to say, while corporate assets used to be hard things like factories, today much of it is intangibles like intellectual property.