As far as I can tell, before the deal USPS did math along the lines of “10% of our trucks deliver packages and 90% letters” so then they laid out the pricing fo

As far as I can tell, before the deal USPS did math along the lines of “10% of our trucks deliver packages and 90% letters” so then they laid out the pricing for packages. But then did a deal with Amazon so that now the trucks are 30% packages. Not projecting into the future and instead trying to hold the pricing ceteris paribus was either a major oversight or corruption