The modern economy is built such that it creates shortages of any worker type that comes into higher demand. When we need fewer electricians, we fire electrici

The modern economy is built such that it creates shortages of any worker type that comes into higher demand. When we need fewer electricians, we fire electricians and stop training new ones. This is bad for the electricians, and also means that when we need more electricians, we don't have a pool of electricians available to meet the need, and we don't have a pool of people available to train new ones. In fact, people will still be hesitant to become electricians, knowing that once the demand is fulfilled, we'll start firing them again and they won't have a great way to make a living. We need idle slack in the system, and we need some form of guaranteed income so we can maintain availability of skilled labor of all sorts.