 What happens to drafted workers?
What's more important—Man's conquest of space, or one spaceman's life? It was better to retire on a limited crediting, on a confoundedly limited crediting, than to take the two or three more trips in hopes of attaining a higher standard. Time to decide that a one room mini-auto-apartment, complete with an autochair and built-in autobar, and with one wall a teevee screen, was all he needed to find contentment for a mighty long time. His friend said drily, "Either of us could have volunteered for pilot training forty years ago, Lofting. Percentages were against his ever being drafted into industry. Automation being what it is, only a fraction of the population is ever called up. He is now legally eligible for retirement. He was drafted into the working force reserves, served his time, and is now free from toil for the balance of his life. The man is the only trained space pilot in the world. If it is admitted that our organization has degenerated to the point that we haven't a single pilot, then it might well be that the Economic Planning Board, and especially those cloddies on Appropriations, will terminate the whole Department of Space Exploration." Have you never heard of the seaman who dreamed of returning to the village of his birth and buying a chicken farm or some such?
 They train and work for a time, then retire with extra funds.
 They train and work for a time, then retire with extra funds.  They receive no pay, and have to undergo training and work for some time  They are called upon throughout their life for periods of work.  They work a short period of time, then return to normal life.