Automation practically eliminated the labor required to provide for the basic necessities of human survival, but if I don’t maintain an increasingly inconsequen

Automation practically eliminated the labor required to provide for the basic necessities of human survival, but if I don’t maintain an increasingly inconsequential job, then I will die homeless in the streets in short order. I’m really not trying to argue for or against any new technology. But I don’t see why any new technological change necessarily brings about UBI given the absolutely drastic reduction in the amount of labor necessary for human survival we already achieved in the mid 1900’s. So my question is still, why did the old forms of automation not bring about a post scarcity utopia (or at least a UBI)?