An unkind summary, then, of the past half decade of the consumer internet: Venture capitalists have subsidized the creation of platforms for low-paying work that deliver on-demand servant services to rich people, while subjecting all parties to increased surveillance. These platforms may unlock new potentials within our cities and lives. They’ve definitely generated huge fortunes for a very small number of people. But mostly, they’ve served to make our lives marginally more convenient than they were before. Like so many other parts of the world tech has built, the societal trade-off, when fully calculated, seems as likely to fall in the red as in the black.