Does someone measure 'okay the economy has grown 5%, it needs 5% more money to be printed?" No, nobody does that.

If the government prints zero money, the money supply can still quadruple, because banks create money out of thin air.

Which is exactly what they did prior to 2008. The reason government had to 'print' miney in 2008 is that they were replacing all the 'unsupported' money that was creates by banks, and then suddenly imploded.

As soon as you suggest government should print money everyone starts screaming inflation, but when private banks do it, noone blinks an eye.

The rules that allow banks to create money have changed dramatically over the past 20 years, and nobody is even discussing it.