In an impoverished Jewish shtetl in Eastern Poland, whose residents were mired in debt and living on credit, a wealthy and pious Jew arrived one day and checked into the local inn, taking care to pay his hotel bill in advance. On Friday, to avoid breaking the Sabbath injunction against carrying money, he handed over to the inn-keeper for safe-keeping a $100 note. Early on Sunday, the wealthy and pious Jew left the inn before the inn-keeper had had a chance to return the banknote.Read more about it here http://nakedkeynesianism.blogspot.ro/2016/04/kaleckis-fable.html
After a few days, the inn-keeper decided that the wealthy Jew was not going to return. So he took the $100 note and used it to clear his debt with the local butcher. The butcher was delighted and gave the note for safe-keeping to his wife. She used it to clear her debts with a local seamstress who made up dresses for her. The seamstress was delighted, and took the money to repay her rent arrears with her landlord. The landlord was pleased to get his rent at last and gave the money to pay his mistress, who had been giving him her favours without any return for far too long. The mistress was pleased because she could now use the note to clear off her debt at the local inn where she occasionally rented rooms.
So it was that the bank-note finally returned to the inn-keeper. Although no new trade or production had occurred, nor any income been created, the debts in the shtetl had been cleared, and everyone looked forward to the future with renewed optimism.
A couple of weeks later, the wealthy and pious Jew returned to the inn, and the inn-keeper was able to return to him his $100 note. To his amazement and dismay, the wealthy Jew took the note, set fire to it, and used it to light his cigarette. On seeing the inn-keeper's dismay the wealthy Jew laughed and told him that the banknote was forged anyway.