Earlier quoted context omitted.
I think a certain regularity of work is not a necessity for an employer-worker relationship to be exactly that. And at a second thought, AFAIK Uber does even expect drivers to perform "regular" work - not "regular" as in "we write 9-to-5 every day into the contract", but "regular" as in "of course you can work as much as you like, BUT if we see you driving too little time for Uber, below a certain threshold that we s…
That seems like it is fair. They are preferring to handout rides to drivers using Uber as their primary income.
They want to have their cake and eat it, too.