This is a very confusing position. Every Uber has full-time 1:1 "oversight". Waymo has a support team that only directs actions (not remote driving) when the vehicle requests. I would be very surprised if the number of Waymo rides that need any intervention at all is greater than 1 in 20.
My point is you're not going to get much more than half[1] of those Uber drivers into a Waymo control center, even if they're facing unemployment. The workers have to come from somewhere. And it has to be somewhat regular hours, surge oversight doesn't make sense.
[1] Edit - I meant 5% not half, I was on the train and very frustrated with these comments. (not yours, though it seems bad faith to say "not remote driving" when I said "problem solving." The problem has always been the 1-5% of driving which truly requires sophisticated intelligence, that's why the oversight is there.)
Every Lyft driver I've spoken to drives because a) they like driving b) they like choosing their own hours and c) they don't want a boss. Telling them to go into an office for an 8 hour shift with a manager is not gonna work, they will find something more appealing. It's a different kind of employee. (I would enjoy that line of work but I would hate to drive for Uber, way too stressful.)
I don't think Waymo needs a significant amount of vehicle support staff now, and will need even less (per vehicle) in the future. The ratio will probably be something like the number of elevator repair people to number of unattended elevators operating smoothly.
I emphasized that Waymo staff does not drive vehicles remotely, because this persists as a common misconception.