You have to work hard right from the start, and then in 10 to 30 years (depending on how much you invest and how smart you are with the way you invest) you'll earn a good amount of passive income. My friend's father owns three businesses: 2 department stores and a greenhouse. He works in one of these businesses. Different family members manage the other two places and there are also managers for different departments and, of course, employees. My own blog generates a substantial amount per month and I usually devote around 20 hours a week to it.
I used to spend a lot more time on it until I started to outsource. I hired social media and hired a writer to help me with the workload. You can live on dividends by investing enough so that the amount you receive each year covers your annual expenses. You can't just invest your money and then ignore it, but you'll want to keep an eye on your portfolio to ensure you're always getting the best return for your money.