If the “robots” are really mere machines, then it should be easy to peacefully divide up the surplus more-or-less equitably, we’ll transition to socialism and everyone will be happy—it’ll be like Star Trek
Anyone want to bet on this one? in 2050, barring the singularity, Robots will do most work, including most work we currently consider to be intellectual work, and 90+% of the population will live largely useless (n the historical sense) lives, because robots can do EVERYTHING better than they can. Socialism will prevail, because caring for fellow humans is higher priority than abstract principles for almost everyone...and the almost everyone will besides have HIGH monkeybrain motivation to believe that this is right (it applies either to them or their close friends).
In the world of Iain Banks Culture, where material wants are gone...socialism is a brain-dead default state. Tyler Cowen has been on this theory-path for at least 5 years (I saw him post something maybe 5 years ago about the topic). I've been here quite a bit longer than that.