Hmm, we have 2 living saints I think - The Arch Duke of Osoerde and Her sneakiness. If I build a chapel dedicated to St: Osoer in Achiese (the town is feeling as bit down at present) would he be a special case - assuming he isn't too embarrassed to go inside and be preached about?
In any case the answer is
simple, the ruler publicly throws money and regency at the temples, loudly proclaiming himself their servant, so that their actions are seen as funded by him and any glory they gain reflects on him. He is their string right arm, servant who deals with temporal matters, etc.
Don't worry Iasonas, I promise not to abuse such goodies...