Gasoline is heavily regulated and subsidized. Leaving the oil market alone resulted in Standard Oil, and we obviously don't want that again.
Standard oil not only reduced consumer prices for gasoline, but was already losing its monopoly to competitors during the antitrust trial.
I am not saying that there should be no regulations on monopolies. We are discussing a very specific market intervention, namely the proposal to
> systematically [use] a pricing structure that charges disproportionately more for usage above high thresholds.
This is what I'm arguing is a bad idea, by using gasoline as an example.
If you want to argue that imposing this pricing structure systematically is good because it would help prevent a bad monopoly like Standard Oil, you'd need to explain (a) how this market intervention would prevent monopolies and (b) how it's a "better" way (according to however we decide to measure "better") to prevent monopolies than the alternatives. I don't see how this is true, though.