Did you pay cash for your house or you borrowed from the bank?
Borrowing money play a big portion in helping us to buy stuff and hence keep the economy running.
Stagnent money is what kill the economies. Look at the EU and you know what I am talking about.
Borrowing money for large purchases like a house or car is one thing. Using credit to buy fast food at Mc Donald's is another.
It doesn't help the economy, it just makes it speed down the slope to the point where you can't pay the interest on your debts. We are close to that point now.