Money = Time, most people use their whole life spending their precious time to get money. If you are rich you don't need to spend time to make money, you can do as you want 
Obviously , you are absolutely right. If you are rich, you do not need to spend your precious time to earn money. For that reason, money can bring happiness to everybody's life with the help of not wasting our precious time on some nonsense stuff like working for a company .