"If you combine your idea pitch with a working prototype (doesn't need to be polished), it's odds of getting adopted will be far more likely." I have a family

"If you combine your idea pitch with a working prototype (doesn't need to be polished), it's odds of getting adopted will be far more likely." I have a family and only have so much free time. Even if I didn't, why would I spend my free time building anything for a company and not get compensated for it? Even if you go through all of this, there is no guarantee you will get the responsibility and pay increase. I honestly don't really care about any of my ideas winning out. I'm perfectly content getting told what needs to be completed and coming up with a good solution.