Planning ahead should eliminate wastage, but if you have surplus vegetables you'll do a vegetable soup, and all fruits threatening to " go off" will be cooked or juiced.
Of course, collecting taxes, stopping food wastage and slashing subsidies is easier said than done, especially when faced by some of the most powerful lobbies in the world.
But even though a larger stock might have some attractions as representing a store of wealth of stable value, this would be offset by its carrying-costs in the shape of storage, wastage, etc.