"Some motivations may be:"
well said "some"; but I believe some of these alone, can be very dangerous! for example if someone starts his/her own business JUST bcuz of "Sense of ownership" or "Personal freedom and control", a failure is probably in the corner.

I have written this on wealthy people mindset, how they spend their wealth to be more wealthy:

https://steemit.com/business/@honarparvar/how-the-wealth-changes-in-generations