LOL...I don’t think they teach that anymore. They couldn’t possibly...probably not for the last 30 years.
It is all Keynesian Economics now, probably. How else to explain the preponderance of these people at all levels of government and apparently, industry?????
My professor in 1960 was a Keynesian fan, but at least he taught supply and demand. He used to make me crazy with his tax and redistribute BS. I recall I made a C in his class.:-)