Comment by specialist

Preaching to the choir, yes and:

> ...supply chains matter.

A corollary (?) is that competency matters too.

The outsourcing mania forfeited vertical integration to please Wall St. Collateral damage included knowledge, culture, and ability to innovate.

> ...not likely to be an efficient strategy

Per principle of no free lunch, greater efficiency at the expense of resiliency.

> ...tariffs and similar policy levers...

Yup. The Rudyard Kipling School of Economics doesn't acknowledge realpolitik, will to power, balance of trade, finance, labor relations, foreign interests, etc.

The Econ 101 glasses give a very myopic view of the world. It's just an introductory model for a very complicated system.