Swipe fees have increased steadily since the introduction of debit cards 20 years ago, when there were no swipe fees at all. Merchants can't negotiate or control them. They've tried, but they have no leverage against the big banks and issuers. So they get ignored. ↗
But it must not be thought that I say this out of personal experience: for in the many years that I have been before the public my secret methods have been steadily shielded by the strict integrity of my assistants, most of whom have been with me for years. ↗