[fred42]

yes, but raise the price of junk mail & the total volume will drop, reducing the number of workers needed.

[muawiyah]

Talk to the Postal Rate Commission. That's an independent regulatory agency that conducts elaborate hearings from time to time on postal requests for various prices ~ up or down.

They are usually loathe to simply let USPS charge a higher price without some sort of cost justification!

Their job, in part, is to protect the public from predatory pricing practices.