Just going from memory, but something in support of that is that when a country puts out more people with advanced degrees, this does very little to increase GD

Just going from memory, but something in support of that is that when a country puts out more people with advanced degrees, this does very little to increase GDP. It does much less than how much an individual gains in income with an advanced degree. This hints it’s not actually making people more productive. It just lets them get a bigger piece of the pie.