> If all the airlines (or whatever business) are doing something like this

Then that would be the main issue and far worse then the algorithms, that's a monopoly or cartel and not a free market. Because in a competitive market prices will be competitive with very little arbitrage.

I've got news for you there. The Biden administration tried to take the first real antitrust action in decades and then suddenly a bunch of tech oligarchs switched from supporting Democrats to supporting a convicted felon