We know what labour vouchers are so I won't get into them. I've heard varying opinions about this. We know we can't have the vouchers be accumulable or transferable, as it would be a problem if someone has saved 10,000 hours over years and spends them all at once as now society needs to produce enough goods to accommodate such an unexpected spike.,

But how long should vouchers last? What is the logic to determine how long it should last?