We have reached the point where it may finally be able to break through the membrane of cognitive dissonance that has been blinded people. The very first course in economics –starting in high school, followed up in college and then refined in graduate school – should explain to students why it is false to believe the advertisement that Wall Street has been trying to sell for the past half century: The deceptive promise that an economy can get rich off the mathematical “magic of compound interest.”
The unreality of this promise should be immediately apparent by looking at the math of exponential growth. Already at the time of the American Revolution, financial economists were popularizing the contrast that Malthus soon would imitate in his population theory: Debts grow at “geometric” rates, while the economy itself grows only “arithmetically,” in a slower and more linear way.
All that is needed is to put this idea together with the basic balance-sheet definition: One person’s savings are lent out to become other peoples’ debts. So the “magic of compound” interest to savers means an equal “magic of exploding debt” to somewhere else in the economy. And inasmuch as creditors insist on protecting themselves from inevitable default by possessing collateral, it is natural that most of the economy’s debts are owed on its largest asset: land and buildings. This explains why mortgage debts have become repayable and “gone toxic.”
