I suggest you...Do away with the fiat money system, in which, our money is not based on anything but faith.
An economic equation should be used that factors in such values as population, employment, debt, productivity, harvested natural resources, etc.
I am sure some economist can come up with a very appropriate equation that most countries could agree with adopting.
I think is as simple as you cannot print more money than your population can produce in a given year. We need limits to spending, now!
By making our money have some tangable value we could gain purchasing power and ultimately save money.