That they have little to to with the cost of an item or service.
Don't let that stop them from getting worked up, along with polititians (D) who think text message profits might be too high.
Simple truth: The prices are set by the consumers and the wireless companies. There's plenty of competition to go around, in as much as regulators allow for it. If texting is too expensive, people will stop texting. (I don't text for just that reason.) Profits are not evil.