These higher prices have corresponded with worsening service. The mailman used to deliver twice a day in urban areas, but now Postal Service Chief Executive John Potter says he wants to stop Saturday service to reduce costs. No private business in America could continually raise prices, lose billions of dollars and then hope to win back customers by promising poorer service.

Here’s a secret Washington doesn’t want to admit: That 14 cent per letter cost hike after inflation over the past 60 years imposes a $20 billion a year toll on the U.S. economy. The government mail system is essentially a $20 billion annual income transfer from businesses and households to the postal unions.

About 80 cents of every postal dollar pays for employee salaries and benefits (compared to less than 50 cents for Fed Ex and UPS). What that means is that if you want to cut costs at the post office, you have to slash labor expenses. Mr. Potter has reduced Postal Service employment to 650,000 from 800,000 the past four years, largely through attrition. But he still employs 650,000 workers who have among the best wages and benefits in all of American life.