At least in the US, you have a very narrow window to cancel and then you're stuck with it, unless you pay a huge premium for a refundable ticket. But I agree, practically-speaking, the only solution in a late-stage capitalist marketplace is to create some crowdsourced pricing information to identify pricing outliers. Which, truly, isn't a good solution.
If we had a functional government, this would be regulated/prohibited on an emergency basis, since in theory government is supposed to represent people and not corporations. Unfortunately, in 2026, we're livestock to herd and fleece.