We should keep in mind that under the current system, goods are made before they are sold. Meaning that not buying so much now might have future benefits later,

We should keep in mind that under the current system, goods are made before they are sold. Meaning that not buying so much now might have future benefits later, but at the price of throwing away unbought stuff. And just-in-time manufacturing (e.g. 3D printers) looks awfully slow.