On some levels of the pyramid, children can be the real authorities. Medical knowledge is of paramount importance here. Advice for help. People who offer themselves as negotiators between others. Finally, there are those who give advice as to how to solve a problem in such a way that others profit from solving it for the one who needs the solution.
Engines can of course do many of the jobs on hand.
A lot can be automatized. Most of the interactions will not take place at crowded places, probably. Books are quiet. Help is available. In this giant library of mankind, it suddenly turns out that far too few people are so far employed in the knowledge sector.