I think the problem is that the definition of goals is too vague and narrow causing the problem with using SMART system. I believe you need a hierarchy of goals, like so:

- Mission: This could be specific like "bring humans to Mars" or it could be vague like "accelerate space exploration".

- Strategy: This should be the principles and methods used to implement the mission. Example: "Starting up a private company that works on rocket technology. Sell electric cars on the side to make money."

- Roadmap: This should be actionable, measurable and time-based such as "build a reusable rocket by 2016"