The solution to such information asymmetry is to mandate disclosure of all algorithms and data used in setting the price.

That won't work. The issue is a fundamental power imbalance being exploited by the seller. An individual will never have the time, money, or energy to be on an equal footing with companies that do this. So giving people a bunch of algorithms and data does nothing. It's just like giving people EULAs and pretending that because they have the stated terms, it somehow makes them an equal party. The solution is to ban situations where these power imbalances exist. Too bad capitalism is inherently based on them....