Government printing bills has literally nothing to do with the amount of wealth in the world. They don't use those physical objects to pay government debts, nor do they dole them out to stranger or "friends".

The government can generate money in the short term by changing lending rates ("the Prime"), which allows you to buy more for less interest, which encourages purchases. The long-term effect includes paying off that interest, of course, and someone still has to want to loan money at that rate; if the Prime went to zero your credit card rates still wouldn't be zero.