Faith in Free Markets

Faith in Free Markets:
I agree, then, that economists have faith in free markets. We can’t prove that free markets will generate a better result. But we’ve observed them long enough to have faith in them. We believe, with faith and evidence, that free markets provide the most prosperity for the most people.

I’d love to know where they found a free market to have faith in. I’ve never seen one that wasn’t structured, biased or otherwise guaranteed by governmental or corporate structures.