>I personally don't think mandating all actors to altruistically abstain from transacting at market price would be a sound policy, but that seems to be what liberals want.

Ding Ding Ding!

The relevant question is why isn't there competition to drive the market price down.

If it appears that there is a monopoly or oligopoly extracting value from it's market position, the solution is diversification, not profit controls.

Profit controls just drive prices higher as companies strive to inflate their COGs