This comes up with predatory pricing antitrust claims, which are complex in themselves, but you shouldn't punish someone or an organization for behavior that they only have the potential to do, but have not done.
I think it's destined to happen when there is less competition. I don't think of it as punishment, but as prevention. Even if we assume a company was altruistic and kept prices artificially low, the lack of competition would at least prevent a product from getting cheaper faster due to less players innovating... and we wouldn't even be able to measure what we're missing out on.
