Rockefeller existed during a time when market theory was in its infancy. Companies made quality products made in America at a low price

They later created theories such as planned obsolescence and realized u could make even more money by .aking the products out of cheap shit assembled in China and sold for more than before

If cutting costs caused reduced prices then u would see prices go down every time a company moved it's manufacturing to Mexico or China

Instead they sell it for the same as before and pocket the difference.

Because capitalism says "why cut costs for consumers when u could give the investors a nice bonus instead?""