<prompt> Translate the following text to EnglishKwa upande mwingine, kwa kiwango ambacho wajumbe wa barua hutuma kwa njia pana kwa maeneo yote, mfumo wa aina hii haubadilishi bili za posta, ingezidisha tu viwango fulani na kupunguza vingine.  <response>: Also, to the extent that mailers send broadly to all destinations, a system of this kind would not change postage bills, it would just increase some rates and decrease others. 