Where does the money in the economy

As a resort town in the county came to secure a tourist. He took off his number, paying the innkeeper $ 100 per room. That without thinking twice, he ran back the debt the butcher, the butcher - a farmer for a cow, a farmer - a veterinarian, a veterinarian - a long-standing "friend" who maintains in debt, and she returned to duty of the owner of the hotel, which rented apartments to clients. Once all paid off with each other, newly guest down the stairs, and said the landlord, that number is terrible, went in search of another hotel, taking his same bill. That's it, thanks to the "mutual responsibility" and a lot luck resort living without debt, and rejoice in each new day! Meanwhile, the economy has increased by $ 100 ...