I don't see how it's that similar. Employees getting a new job is often very difficult, so would create a lot of difficulty for a lot of people. Whereas Amazon raising their prices by a few cents shouldn't be much work.
If someone can make money by fraud, that money is not justification to allow fraud. The US economy relies on dependable contacts.
Which law? "The Law" as an ideal, is impartial. That's irrelevant. In practice, applied law (and the cousin enforced law) leads to biased results, favoring the wealthy and the status quo while remaining "impartial".
We shouldn't let a defeatist attitude discourage attempts at improvement.