Thinking about something is useless unless you have a deep knowledge of the domain - including the ability to deal with the details, which are the downfall of many grandiose ideas. For example, if you don't know anything about computer architecture or chip fabrication, why would Intel want to know your thoughts about where microprocessor technology is going to go in the next decade? If you know nothing of aerospace engineering and orbital mechanics, why would NASA ask you about how to get to Mars?

Domain experts who are paid to think deeply about problems and propose solutions are called consultants. There are a lot of them out there.