Consider a parallel universe where people have developed into beings who can survive by doing photosynthesis. That means there is no need for food they can just survive just by using sunlight. Now consider in that universe they are same technologically advanced as us here. So how does their lifestyle or living rules changes?
So by lifestyle or living rules I mean in current society most of the world depends on food for surviving, people start earning to get basic necessities i.e.
food, clothing and shelter with food as priority. But now since there is no need for food so how do people prioritize their actions?
Note I know the answer can be on a broader scope but I only wanted know different perspectives which you can offer.