This bill would stop mail delivery on Saturdays and the loss of business would hurt the profits of the service. The Postal Service, by the way, is completely self-funded. The only reason it is in financial trouble is because Bush introduced a mandate that the service pre-fund retirement for 10 years in advance. Without that mandate the Postal Service runs a profit.
Tell me: do you want to drive to the nearest FED EX or UPS office to pick up your mail.