In point of fact, there is a federal act that prohibits private mail carriers from delivering mail at the same or even twice the rate of the USPS so as to ensure that citizens still use government mail carriers. I'm too lazy to look it up right now but there is one. I only know this because I did a presentation on communication over the years - I also learned that the fax machine was invented in like 1830 and I couldn't believe it!
But, my gripe isn't really with the price, its the inconvenience of having 5 books of stamps to keep up with all with different values. I do agree with you that 42 cents isn't really that much to deliver a letter. :) Now, if I had just bought a couple hundred of those "forever" stamps I'd be happy.
btw: i used to live in pinellas county, loved it... till they demolished my favorite restaurant, whiskey joes on the causeway... *cry*