It's not about the difficulty of raising prices, it's about the impact to the bottom line profit to shareholders when a few cents is extrapolated over a billion transactions.
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.