Asimov didn't portray any revolution because he was, in his day, a socialist. He simply assumed that clear-thinking human beings would deliberately employ the best planning instruments they had available for their governance, those being the robots.
I at least partially agree with him on this one! Mid-20th-century American "libertarianism" aside, working in government, and even political "freedom", is simply not the terminal goal of most real people! Yes, we want our Mind overlords (paging Ian Banks) to leave us our free choice in personally-important situations so we can have responsibilities and achievements, but when it comes to keeping the supermarkets stocked, the health clinics open, the data-centers buzzing, the budgets balanced, and the trains arriving on time, automate away!