I don't mean fractional reserve. I have no problem with fractional reserve, as long as the fractional nature, and the risks behind it, are made plain and clear to all depositors.
Do a quick google for "debt backed money" and you'll see what I'm saying. Try to weed out the nutters and look for the facts behind it. The vast majority of money in our currency systems are borne from debt - You go to the bank and ask for a loan, and the promise from you to repay that money is all that is needed for the bank to effectively conjure that money into existence.
Even in a monetary system that isn't backed by debt, severe deflation can still cause problems. And what we're seeing in Bitcoin right now is probably some of the most severe deflation (and volatility) that you can imagine in a currency. (And yet people are still doing their level best to make a go of it - interpret that as stupidity or optimism as you prefer).
The reason deflation causes disaster in a debt-backed system is that deflation causes the money supply to shrink, because loans dry up, leading to the deflationary death spiral. In a system where money isn't backed by debt, the drying up of credit doesn't affect the actual supply of money, so you don't have that vicious feedback cycle.
That is the reason central banks try very, very hard to avoid deflation and actually target mild inflation - they know that their monetary system would verge on collapse in the presence of persistent deflation. However they don't publicise the reasons behind, merely trotting out the "deflation is bad" line so often that it's become accepted truth. Problem is, it's become accepted as a universal truth, rather than what it really is - the truth for the current system which they are charged with maintaining.
You concede that credit drying up is a trigger for a spiral. I agree credit is one factor, but also the simple "spend versus put under mattress" question is a big factor but let's leave that aside for another post.
What category of debt relates to "debt backed money" which you are talking about? I think you mean that gov't creates debt which (indirectly) creates money when the Fed buys it like they are doing now. This is actually not correct through all stages of the cycle (Fed sells debt during good times) but let's leave that aside for now. This means you are only taking the impact of
government debt off the table with a non-debt based currency (actually this statement is tenuous but I'll give you the benefit of the doubt.)
Not all of debt is issued by the government.
How will non-gov't debt be affected by the same phenomena when there is "stable deflation"? How will corporations/individuals think about obtaining loans in this environment? You can get a $100,000 loan today to buy that house you wanted but actually in the course of paying the mortgage, you pay back an amount which is actually way more valuable on the day you pay it back. $100,000 in 24 years would be able to buy 2 of the same houses in a stable 3% deflationary environment. So the environment means that either a) you can lend money to buy 1 house today but the contract states you need to pay back with money which can buy 2 houses in the future or b) wait until you can afford the house in full at its market price. Would you take out this loan? If you can't afford one now, what makes you think you can afford two in 24 years? And this math assumes that the bank will lend you money at 0% interest rate!
Concisely, a stable deflation environment incentives you NOT to purchase big ticket items now.
I would never apply for ANY loans in a deflationary environment. Hoping that other people are logical like me, what happens is non-gov't credit demand dries up. Less homes are sold, less corporations fund projects, the system grinds to a halt.
Do you agree? Or are you also saying we need to abolish debt altogether to make deflation (and BTC) work?