I'm many US states, loss of flexibility is the likely outcome. For example, in California you cannot pay someone for a shift lasting less than two hours. You ca

I'm many US states, loss of flexibility is the likely outcome. For example, in California you cannot pay someone for a shift lasting less than two hours. You can send them home if there's no work, but you still owe them at least two, if not four hours worth of pay. So if a driver wants to knock out a few trips while he/she has some time to kill, that would functionally be illegal due to the cost burden. Current employment law assumes scheduled shifts, so the "drive when you want" option would likely fall apart when Uber is given the legal right to dictate that X number of drivers will be working peak hours.