Unless they've sacked their money away under their mattress, it has been deployed back into the economy. It is either invested or in a bank where the majority of it has grown the pie of total dollars through loans (this is often not well understood). If I have ten dollars that I place in a bank, they will only hold the required reserve. Assuming this is 30%, then seven will get distributed in loans. The effective size of the money is now 17 dollars.