What will Humans do when we don’t need each other to do anything?
Well, SKYNET will determine that we are no longer needed and will be slated for extermination.
Become robot-designing engineers (mechanical, electrical, software) or perish.
Truth be told, politicians will fleece the engineers (producers) to give handouts to the rest who will be bonded in subsistence and indebtedness to perpetually vote for the same politicians.
No one can say with certainty, of course, but I remember reading in a dusty old book once that "Idle hands are the Devil's playground." I'm sure nothing good will come of it.