I am not sure what your point is. Why are you showing a chart with shoes. You lump labor and overhead together?
Have you ever run a business and done a set of books, or managed a P&L division?
I ask this because you really don’t seem to understand how accounting and manufacturing works from an accounting point of view.
They were lumped together, IMO industry and corporatists don't want us to know what actual labor costs per item. The info is hard to find.
I am looking at MACRO economics, at the entire cost of manufacturing including the social, political as well as economic impact of offshoring.
My main question is whether the loss of an industrial base worth the savings? To answer that you have to judge how much is saved. There are myopic idiots that say if it is one penny more then off shore it. Some also think if an American makes $40.00/hr then each item he makes will cost $40 more. They are morons. I am not saying you are like that.
For the most part manufacturing overseas in the 3rd world saves very little and but the damage to the USA's manufacturing infrastructure and know how is enormous. IMO the USA should to keep the corporate penny pinchers hands out of the international cheap labor cookie jar by coercing them through tariffs to make it here. Just like every other country does. I say that without shame or reservation.