I pay a heck of a lot more to my landlord than I get in return. Is our relationship sustainable? Or should I buy some land that I cannot afford?
One can allow for indirect economic circulation, such as you buy from A who buys from B who buys from C who buys from you, but an ironclad rule is that giving out more gold than you get will eventually leave you un-rich. Especially if you are immortal, like a country.