This is not how economics works. There are supply curves and there are demand curves, then there is the quantity supplied and quantity demanded. If the demand for a product shifts up (increases) due to basic income, then the quantity demanded increases. Then inventories of that product decrease, indicating that the firms could start producing more and still be able to sell it. They do this, but there costs go up, since each unit that they produce now costs them more on average. [assuming they are producing with increasing marginal costs, which is generally true]