Imagine situation that in the future most people would have some Social Basic Income, which would be enough to survive.

Well, you seem to be quite optimistic about our future :D To be honest, I am much more sceptic about the day when everyone on Earth will have a basic fare income ;) However, your idea is really interesting. I started a research on another topic about self-esteem, but I hope that I will be able to create a future post about purpose, meaning, and society :)