It means they want a paycheck, and Uber will give them one. People driving for Uber are generally not particularly well off (they are not in poverty either, but they are not in a position to debate with employers). That means Uber is taking advantage of them, in precisely the same dynamic as factory workers and business magnates around the turn of the 20th century. What you're advocating is to REVERSE a full 100 years of progress in the field of labor rights. Why exactly is this good? So that startups can keep 'disrupting'?