That's not a physical law. It only happens sometimes in some parts of the supply chain in the form of economies of scale. But if you run out of easily drilled oil sources, the unit cost of produce more oil increases. If you want to build more cars, you would increase demand for parts, and would in turn be willing to pay more for the scarcer parts, and your BOM increases.

It only makes sense to refer to what you described as a phenomenon you want to pursue if you want to run a successful business, but can never be used to describe the economy as a whole.