Probably the best approach would be to explain why the current failure can not be attributed to the “free market.” This is, obviously, because the market is not free. It might be more free than many (or even all) other markets in the world, but that doesn’t make it free.
FWIW, arguing from efficacy is not a good idea, and I would avoid taking that stance (or getting sucked into that argument) at all costs, not because we can’t win it, but because A) efficiency is also subjective and B) it doesn’t matter how efficient something is, if it’s also immoral.
I assume you’re going to focus on the financial sector, since that seems to be the bulk of the problem. The financial sector is one of (if not the) most heavily regulated, closely scrutinized, monitored, overseen, and manipulated sectors in the global economy. For Christ’s sake, it is an open and notorious objective of every central bank and central banker, to manipulate interest rates.
In Smart People Are Realizing the Banking System is Broken, I wrote:
There is no free market philosophy in the current administration, nor is there a free market philosophy in any administration which seeks to impose systematic, top-down controls on the entire economy. A free market abhors the idea of nationalizing industry, of bailing out lenders, too big to fail. The free market did not cause the current economic Vesuvius, because the U.S. economy is not a free market.
The manipulation of interest rates affects the prices of everything. And these distortions are what eventually build up and cause economic collapse. Eventually the distortions cannot be compensated for, cannot be reconciled.
Do you have a draft? Or are you just brainstorming? I’d be happy to offer some criticisms/advice/edits if you have a copy you could send to me.