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.
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.
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.
Yet the treatment both of what is purchased from other firms and of the wastage of the firm's own equipment as a consequence of producing the marginal output involves the whole pack of perplexities which attend the definition of income.