The problem is that the world's fractional reserve system always needs more currency to support the leverage (currency) that the expansion created before. The other main problem is that, it takes money from the working productive society and forces the people that operate this system (banks) to keep shoring up this leverage (leverage is their, the banks worth or value) without creating hyperinflation. How are they able to do that?
The way they do this is that there is two ways to create money. One is productive and expansive that benefits and creates new wealth and a productive society (Fractional lending).
The other is non-productive and contracts/shrinks the economy(direct printing of currencies).
If the money was just printed up and dropped from helicopters on pallets it would work, for a while but, it would sacrifice the leveraged wealth, because money that is just printed and that bypasses the fraction lending scheme cannot be specifically steered or directed to the balance sheets of the financial institutions, to create the illusion of solvency.
I am not getting out the Pom Pom's for fractional lending system but, if it was allowed to work we would not be in this situation. There is too much debt and the world's financial institutions must take a "Haircut" to even make a dent in returning us to some type of productive economy. Problem is that a haircut of "just one" financial institution will effect 50 other financial institutions balance sheets (because the leverage was fractionalized) removing the illusion of solvency.