Why not ban usury?

The fact remains that if you believe that bankruptcy is legitimate, then you believe that it is legimate to reneg on these so called contracts. If you believe these are legitimate contracts, then you believe that theft is legitimate. Let the cognitive dissonance commence!

That has nothing to do with simple vs compound interest. Like I just said, the issue is ultimately about unlimited liability.

Weather or not defaulting on a loan is theft is neither here nor there. Even if it is theft, what are we to do, make the borrower a slave? Let the contract state these things. We have no business interfering in voluntary agreements (assuming there truly is agreement).

Yes exactly. The issues in question are unlimited liability and weather or not people understand the agreement, not the mathematics behind the agreement. If X then Y. What takes place within the calculation is irrelevant once a defined value is agreed to.

So, if a “usurer” uses clear contracts with defined values, we should have no problem with that activity.

That was my point - I’m trying to underscore that the current system does accept compound interest in calculating liability in certain cases. Since mathematics really has nothing to do with the question of justice, I’m arguing that this should be dispensed with. And, as a prediction, I think that once this is dispensed with, it will have a massive impact on the nature of the loan market. I think the loan market would massively shrink in size, I think that simple interest, fixed-term loans would become more common and I think that interest rates would go up quite a bit, especially in the low-end lending market.

Clayton -

Clayton, it looks like the key issue isn’t all about interest, its the fact that courts don’t enforce the tool of the performance bond, as described by Rothbard in Ethics of Liberty. So they have to use other vague measures, such as including interest.

And it looks like the issue is a problem with the “innocent until proven guilty”, that the debtor is “guilty until proven innocent”. Am I right?

@eliotn: You can put it that way but I want to underscore that I think older moral/legal philosophers were well aware of these issues and the prohibitions on “usury” (that is, lending at interest, even simple interest) were actually based on these considerations. This is very clear from Sharia law regarding banking. It is permitted to effectively lend money, and it is even permitted to make money lending money, but the instruments are structured such that there are no open-ended obligations. It’s a gross and irresponsible over-simplification to simply say “Islam prohibits lending at interest”. Yes, it does, but it also effectively permits credit when the arrangement is properly structured. I guess what I’m trying to say is that I see a historical correlation between the rise of positive legal theory in the West and the explosion of credit-based, Western economies. When you throw “justice” out the window, it’s all just a big math equation.

Clayton -

Isn’t 5 % per annum a single, agreed price?

It depends on the interest rate.

Is a commodity you can’t use, exponentially less valuable in time as you can’t use/invest it when someone else is borrowing it from you?

But they do so in a society where the fiat-money is inflated, so if that car is an investment that enables them to be more productive immediately, that might not be so stupid, as the loan decreases relatively to their growing income as money is being inflated.

How do you know?

…with enough regulation to curtail supply in a given area, real estate prices will increase in value, so borrowing to invest in real estate might be profitable in a fiat-monetary system.

But that’s why few debts are structured as zero coupons contracts.

Most real world contracts have a stream of coupons payed on pre-assigned intervals (usually of the same length) where the accrued interest since the previous coupon payment is payed, thus leaving only the principal. So you pay 8% over the principal every year and in the last year you pay the principal + 8%, and you have no exponential explosion. And this can go on for an infinite amount of time. Or you can structure so you pay the interest plus a part of the principal so that in a number of years all is payed.

This mode of payment seems to have worked well since the middle ages and perhaps contributed to the prosperity of the judeo-christian world, which lagged far behind the Islamic world before the Reinassance.

Even though this is a very complex process, the relative freedom to practice usury many relocated spanish jews encountered in the prostestant electorates of the Holy Roman Empire, as well as in the Habsbourg Netherlands and London, contributed to the advancement of these regions.