It's pretty simple for you to get a good income "you must be a producer and not just a consumer" I believe this rule is what must people who are entrepreneurs live by, hence must salary earners at some point after accumulating enough savings they result into owning a business but perhaps it's not compulsory to own a business.
Some people who owned business still remain poor so it's not a guarantee that you will be successful (what you call "rich"). If one earns a good or significant amount of money and do not want to own a business investing in others business could still make you a very good return, perhaps being a shareholder is quite a good way to earn as much as the entrepreneurs.
If you only choose to be a consumer, you will be spending all you have for the benefit of others. Because buying of order peoples goods will only benefit the manufacturer or producer of that particular product. But if you are a producer, and you produce a quality product, people will also purchase your goods and services and it will be vice versa. As you are purchasing people's products they will also be purchasing your own, and the equation will be balance. Because both sides will be benefitting from each other. Doing a business doesn't guarantee riches, you need to work very hard to make your dreams come true.
Being a producer in this context isn't just about owning a business or having a company for services but it's about doing something that the world can't resist from and consuming your information or product every now and then hence success will be achieved. working hard doesn't guarantee anyone to be successful, if it does I know people who would merit success big time but then it's about being smart and putting what you have into what will bring more and the profit into another thing which will bring more profit that's how it works and perhaps we are here in a bitcoin community and we all believe in the future of bitcoin so puting some stash into bitcoin might help you in the nearest future.