I propose eliminating all national currencies with a "universal work hour," abbreviated "uh." One uh would be the economic equivalent of one person using a pick and shovel for an hour. This would be an easy conversion for every nation and country in the world. In the USofA, one uh would probably be around $8/hour. Every govt knows what the equivalent in their country would be. Wages and purchases would be in fractions and multiples of uh. One advantage would be that every person could evaluate his job and his expenses in terms of his personal life's energy.