that's not exactly correct given the inflationary nature of printing to "spend into existence." History is filled with crumbled societies printing their own money as mention.
that's a big question, however at a first order, its arguable that no "new" money is necessary. Wealth (not money) is created out of human effort, i.e. labor.
What do you mean by spend into existence? If they collect much more money in taxes and investments than they spend (which they ary), are they then really spending anything into existence?