You may think such a thing is impossible, and certainly impossible to prove, and even more certainly impossible for me to prove, but before you say that first you have to watch the presentation yourself. The venue is Los Angeles.
I also replied to the fellow who had invited me and sent the video because he wrote that “I suggest the phrase Supply Creates the Means to Demand” which is his own way of explaining Say’s Law to himself. And this is the way someone brought up in a Keynesian environment will understand these issues because it has become second nature to think in relation to demand. But unless you can break the habit that thinking an economy is driven by demand and not supply, it becomes impossible to understand classical theory, and in my view impossible to understand how a market economy works. So I wrote back with this:
Your note does remind me how difficult it is to understand since the issue of spending never seems to go away, which a supply-side economist, like Mill and myself, see as about as irrelevant to aggregate economic outcomes as it is possible to be. If you tell me that in a recession there is some kind of panic and credit freezes up and business ventures are not commenced at the same rate as in good times, I will say of course, but so too did JSM.
Thinking in money flows and in relation to spending will stop you from understanding Mill and thus, in my view, from understanding how an economy adjusts. Once you are thinking about whether people will spend their money and not whether entrepreneurs will try to open new businesses and expand old ones, you fall into the Keynesian trap from which economic theory has been unable to emerge for more than eighty years. A financial crisis stops the flow of credit but does not stop the desire of business people to set up new firms or expand the ones they already run, nor does it stop wage earners from trying to find jobs. A really bad downturn can take 2-3 years to get back to normal but things do re-arrange themselves. Having a government stimulus on top of all of the other disruptions in the flow of capital and labour into their most productive forms of contribution can extend the recession outwards for a much longer period of time, and like the situation right now everywhere round the world, it can prevent a serious recovery from ever gathering pace. The Japanese lost decade of the 1990s is now 25 years long! The notion that buyers will stop buying for years on end and businesses will stop trying to find ways to earn profits because there has been a downturn is not just incoherent but contrary to every historical situation in which a downturn has ever occurred. It might be what an academic would do – just give up and wait for a government subsidy – but it is not the kind thing people who make a living by running businesses are apt to do. A stimulus can kill off a recovery but it can never cause one. All this is perfectly obvious to me, but very difficult to explain. This is my own variant on demand for commodities is not demand for labour: employment varies directly with productivity and inversely with the real wage. I developed the theory as an employer advocate in our national wage cases in the 1980s and then when I found the same thing in Mill, which is his explanation for his fourth proposition on capital*, I had found the parent stem for everything which I now believe, and see demonstrated everywhere I go.
Mill noted that even in his own time how difficult it was to keep these things straight, and every economist of his time had read his text. Much more difficult now because of the Keynesian presuppositions and terminology that infuse modern theory with virtually no supply-side economics to be found anywhere at all.
* Mill’s fourth proposition on capital – the Fermat’s Last Theorem of economics – states that “demand for commodities is not demand for labour”. Universally accepted by mainstream economics in Mill’s lifetime, even described in 1876 as “the best test of a sound economist”, which it is. You can read my entire paper on it if you are interested: MILL’S FOURTH FUNDAMENTAL PROPOSITION ON CAPITAL: A PARADOX EXPLAINED.