We have automated gas stations 95% of the time I show up pump my gas and go. There was a time when when a guy would pump your gas but that cost more so people where fine without that. As to Oil, and Tire pressure, my car senses them while I am driving. I don't even need directions due to GPS. Other than cleaning the bathrooms what do do we need someone in the gas station for? O yea, the station does not want to add cash machines to each of the pumps. (I suspect this is because when people are waiting to pay for their gas they are more likely to buy something else.)
IMO, we are already at the point in the US where most people's job's are redundant. But, as the need for people to do stuff drops off the cost of human labor also drops. The human greeter at Wallmart is a great example of this as their job could be done by a sign, OK they also cut down on shoplifters.
Some interpolation. Cutting humans out by 50% has a surprisingly small effect because we've got most of the low-hanging fruit there and you end up with other human costs getting in the way.
You've got to drop them to 0 to really matter.
"We have automated gas stations 95% of the time I show up pump my gas and go."
But there's a guy in the store, and it's going to take a lot of work to get him/her out. The rest of the stuff you mentioned is low-hanging fruit long plucked, and getting the rest of the way there takes a lot of stuff.
"The human greeter at Wallmart is a great example of this as their job could be done by a sign, OK they also cut down on shoplifters."
Cutting down on shoplifting is their primary job; greeters are secondary. Also, to the extent that greeters make people feel more at home and more likely to spend, that's something nothing but a human is going to accomplish.
We can't quite have robotic truck drivers... but we're actually getting reasonably close. We can't quite automate a gas station... but we are getting reasonably close. We can't quite automate a fast-food joint (one of my personal favorite robotic bellwethers), but we're getting within sight of that possibility.
That's why I left open the possibility that this will change in the future. Right now society still requires us to all work, but we're getting within spitting distance of that not being true. Now, that's going to be an economic disruption on par with the industrial revolution, and I'd say we're actually on the early part of that curve, because the first industries to feel this are the ones most easily Internet-able...