<prompt> Translate the following text to EnglishWaliunga mkono ushahidi unaopinga haja ya kuficha kwa kiasi kikubwa zaidi ya makadirio bora ya Huduma ya Posta ya ongezeko la baadaye la gharama ya kukusanya, kusindika na kupeleka barua.  <response>: They sponsored evidence challenging the need for a cushion so substantially above and beyond the Postal Services own best estimate of future increases in the cost of collecting, processing and delivering the mail. 