Your expenditure of time and wealth to create innovations is justified by your realization that it will advance your ultimate goal (your life), so that could be physical survival, or more efficient means of producing goods that are essential to simple physical existence, or any goods that you use to exist and flourish qua man, i.e. using your mind.
That answered my question. I wanted to know what way objectivists would answer that question so i could understand objectivism better.