Each time that money is respent, it generates another dollar's worth of local employment while limiting the environmental impact of that money. If you buy Wander Bread made by Transnational OmniCorp Inc, you are buying a product made with machines and very few workers. A lot of energy and resources are required to run OmniCorps' machines. Their loaf of bread is environmentally costly. Bread from a local source is created with less energy, less resources, and more labor.
Local bread is environmentally cheaper.
This isn't just about where you spend money, it is about who has control over our economy, our environment, and our future. Our cherished democratic powers are limited to government, and our government is increasingly bought and sold with corporate money. We should have democratic powers in our economy, and taking it back at the local level is the first step in that direction. Where it Went, 1975. For the Fed's money management, see Nossiter, Bernard D. Fat Years and Lean, The American Economy Since Roosevelt, 1990.