Say's Law is at the very heart of supply-side economics. As Say says in a nutshell: "I had said -- As no one can purchase the produce of another except with his own produce, as the amount for which we can buy is equal to that which we can produce, the.more we can produce the more we can purchase. From whence proceeds this other conclusion, which you refuse to admit -- That if certain commodities do not sell, it is because others are not produced, and that it is the raising produce alone which opens a market for the sale of produce."
I liked Ayn Rand better:
“So you think that money is the root of all evil?” said Francisco d’Anconia. “Have you ever asked what is the root of money? Money is a tool of exchange, which can’t exist unless there are goods produced and men able to produce them. Money is the material shape of the principle that men who wish to deal with one another must deal by trade and give value for value. Money is not the tool of the moochers, who claim your product by tears, or of the looters, who take it from you by force. Money is made possible only by the men who produce. Is this what you consider evil?
“Francisco’s Money Speech”
by Ayn Rand
Oh, let me guess...so the political n'er-do-wells in our society can wallow like pigs in mud.
Let’s print a lot of money no one will have to “pay for” and regulate the economy to make it more efficient. That always works. /sarcasm