The more that USPS raises their rates, the more business they will lose.<quoted text> You do know the post office just asked Congress for an emergency rate increase? When the cost gets high enough that private enterprise can do it cheaper it will happen. Getting rid of home delivery for non express mail would be a start. Group boxes, as Galt suggested, should be done first.
Group boxes allow one driver in a truck to do the work of several carriers on foot.
Delivery could be reduced to three days per week and nobody would know the difference, because nothing urgent is ever sent by mail.