(This is probably not that interesting to most people, not even those who live in New Jersey, but it might be some evidence for - or, perhaps, against... - the idea that this is a strange law.)
However, in the grand scheme of things, the eliminating the payroll costs from the gas price in NJ would barely have any impact.
At a normal gas station which is neither busy nor desolate, an attendant may be able to serve, let's say, 30 cars an hour. If they each get $20 worth of gas, and the total cost of the employee per hour is $20, then the prices would go down only a fraction of a percent if he was eliminated.
Get out a pump your own damn gas.... jeeze
I don't know what the party line is to justify the gas attendant rules. If it's "consumer safety" then it's bullshit.
Blatant employment protectionism. Every time it comes up on a ballot the "statement in favor" is always primarily employment protectionism. The arguments are generally of the form "if we allowed self service, nobody would pay for full service, and those jobs would go away".
As with many similarly obnoxious laws: Portland votes for it, the rest of Oregon votes against it, and Portland wins.
Is it just regular old people in Portland who honestly believe it is best, even without any lobbying or propaganda?
The stations themselves might not be against full-service, either (at least away from state borders.) It's an extra cost, true, but it's paid by all of their competitors, too, so it just drives prices up. Demand is pretty inelastic, so profits aren't much affected. This might change with electric and fuel-efficient cars becoming more common, but it's hard to think long-term when you're selling oil.
(I have no idea what's caused this. My personal theory is that it improves throughput at busy periods; many UK petrol stations have closed over the past 10-15 years due to the wafer-thin profit margins so those that are left can often get quite busy. But that's just a guess.)
This has occurred to me with airlines as well - we relentlessly optimise for cheap flights, and then complain that we're crammed in to tiny seats while flight attendants hawk duty free goods to us. Maybe we'd actually be happier if the cheapest flights were actually 50% more expensive and nicer, even though that's not what we choose.
My tests suggest pumping gas wearing a sweater is probably more dangerous than smoking. Igniting vapors with a static spark is actually much easier.
If you car is newer than 2006, there is basically zero chance you are in any danger. The ORVR systems are a really nice piece of engineering that is mandatory.