This creates a market discontinuity by the government that leads to abuse. Part of the reason for Amazon's dominance is that USPS undercharges for package deliv

This creates a market discontinuity by the government that leads to abuse. Part of the reason for Amazon's dominance is that USPS undercharges for package delivery. When Amazon rolled out their own delivery service, they optimize delivering the "cheap" packages, and making USPS deliver the "expensive" out of the way packages, and due to flat-rates, USPS was in the red. USPS's solution? Keep squeezing grandma who wants to mail a few first-class letters a year.