Why do you have to make money repairing shoes?

It's not easy to earn money from repairing shoes. If the shoes are broken, they should be repaired frequently. It only takes 1 yuan to go to 5 yuan once. In the process of repairing shoes, I found that the vast majority of people who went to repair shoes were poor, and most of them were migrant workers. It is rare to see rich people repairing shoes. Once I went to a big boss's house, his shoes were not big, and most of them were 90% new. At that time, the boss gave me a curious look and said, "Take a few pairs if you are satisfied. I only wore it once or twice. If you don't want it, I will throw it away. " 90% of the new shoes are given away or thrown away. Will he repair them? Most shoes repaired by shoe repairers are ordinary shoes. A migrant worker repaired a pair of shoes many times. I smiled and asked, "If it's so bad, fix it and buy a new one." He said, "A pair of shoes costs more than 100. A day's salary can't buy a pair of shoes. Can you still wear it after it is repaired? "