His work for the year was complete within those 15 days and those very tasks completed during the time would help his company to generate good revenues for the year. 15 days’ work did the magic and he was free for the rest of the year. Something similar would happen to all the humans over the course of twenty or thirty years from now.
That’s what I predict. If it can happen to millionaires now, it can happen easily to the average human over two or three decades from now. So what will humans do in so much spare time? Spending quality time with family, enjoying life and eating good food are all okay. But he still needs to feel important and do something that gives him the mojo of life.