Why do people like to work?

It gives them something to do, rather than getting bored at home. Having time off is great, but the novelty wears off soon enough and it becomes tedious, so working relieves that. It also makes them appreciate their time off more when they do have it. Working gives them a purpose in life. It keeps them mentally and physically active and that can be good for health. It helps them to meet people. Many enjoy working. It gives them a sense of achievement. They feel they are contributing something to society. It can enable them to do interesting things and go to interesting places. They learn a lot from working. For these and many other reasons, people work.