Then the only limiting factors would be
a — raw materials
b — energy
Both of which are virtually unlimited in space, i.e. the moon, asteroids.
What would be the implications of an unlimited and cheap work force?
Secondary question — how many humans would be needed (on Earth or off) to insure the survival of our species and for scientific/engineering progress, once working/labor becomes obsolete? Couldn't the human species get by with only the graduates of Harvard, MIT and other top universities? Who else would be required? Who would decide?"