It shouldn’t, though to some extent, it operating more efficiently can be a good thing if the efficiency gains can be gotten without significant detriment to service, because then more money is available for either improvements to the mail service or for other services. Profit does not impy efficiency of course, but making something more efficient can make it more profitable.
I’m not arguing that this idea in particular is necessarily a good one, just that the concept of making the service more efficient has merit. Obviously, to actually see the benefits, the idea in question has to actually succeed at making the service more efficient.