That is not what he wrote. He wrote there should be more transparency in the cost of input materials.

There is no such thing in the 1st or 2nd world as a "free market economy." ALL major economies are regulated. To be "free" an economy would have to be unregulated. I sincerely doubt there are many people who actually want that.

The problem with transparency for complex companies is that compliance would be massively expensive. I run a consulting company that also produces software. The price of our servers should be amortized over how many years to show the input cost? How often would we need to update the cost of electricity to comply. There are no right answers for global companies like mine, and thus the desired transparency would not be delivered but the costs would be huge.