Those that run on gas use more fuel and emit more toxic fumes. Cars that run on hybrid fuels get better mileage and emit less pollution. The money economy is like a car that runs only on gas. It is centered on money. End of story.
Money is the gas that fuels our economy.
All our understandings, all the theorizing of economists are organized around the central fact of money as the medium of exchange. Time Dollars add something different. They are a tool that allow us to take money out of the center of the universe. Because they tap into something that we do not think of as an economy, but which really is one. They tap into the economy called home, family, neighborhood, community.