> another example are stories of electricians charging more to people who want EV chargers installed because they already paid a premium to buy the EV, contractors will often bump up their prices if a house looks nicer, etc... these sort of biases have been rampant everywhere for a long time

I think this is a more concerning problem and it's tough to tackle but I'd also say don't let perfect be the enemy of good. We can do some things to start with which I think would capture a lot of the downsides of these pricing models.