The interest on a loan is neither created or destroyed in the loan making process, thus necessitating further loans to cover the interest. There is a gap in time between when a loan is made and when other loans will be made to temporarily cover the interest of previous loans. The interest as a whole though is never covered because there is always less money created then debt created by making loans in Fractional Reserve Banking.
That is pretty much what you claimed earlier and it seems that you believe my example where a borrower creates value through his or her labour is irrelevant to your claim.
So, I have a half-baked example which you might be able to refine to illustrate the ponzi nature of the scheme.
Suppose that you live in a community where there is only one bank. The community has $10,000 in cash and checkable deposits and the bank has $1,100 in cash in its vault and you have no money but the bank is willing to lend you $1,000 (the maximum permissible under 10% reserve ratio).
Before the loan the distribution of money is:
Community: $10,000
Bank: $1,100
You: $0
After the loan:
Community: $10,000
Bank: $1,100
You: $1,000
Since you are part of the community, the total amount of money in circulation is $11,000.
Now at the time you repay the loan we will suppose that you have an interest bill of $100. You can get that $100 from the community by creating something of value (eg your labour) and selling it to the community. After the loan has been repaid you have:
Community: $9,900
Bank: $1,100 + $100 interest
You: $0
So, basically the community has paid your interest bill (but got something of value from you for doing so). If we multiply this scenario by everybody who borrows money we can see a steady stream of interest payments flowing from the community to the bank.
Now, what happens to all of that interest? Well, some of it be spent straight back into the community in the form of wages and other costs associated with running the bank. Local shareholders will also get a dividend (more money back into the community). Some of the interest money will go overseas in the form of dividends to foreign shareholders as well as servicing any foreign liabilities the bank might have. Whatever is left over we could call "undistributed profit" which the bank can add to its reserves.
If we suppose that of the $100 interest you paid to the bank, $50 was spent back into the community, $40 was spent overseas and $10 of undistributed profit remains then this is what we have:
Community: $9,950
Bank: $1,110
You: $0
The extra $10 in reserves means that the bank can create an extra $90 in loans. So the maximum amount of money in the community can be increased from $11,000 to $11,100. This is clearly inflationary and more debt has been taken on by the community to service this interest bill.
The half baked part of this example is that I am assuming that all of this takes place via bank account transfers. Yet the bank has an extra $10 in reserves even though the total amount of base money was unchanged. Where did the $10 come from? Is the community gradually transferring the cash they hold from their wallets to the bank or is there a flaw in my example?