I Believe in Santa! (as a Symbol for Generosity & Good Karma) - Ajahn Dhammasiha
Could it be that a Buddhist monk believes in Santa Claus?
Yes, it could be, in the sense that he believes in Santa as a symbol for generosity. Santa's sole job is to bring gifts to all the kids all over the world. Giving is good karma. Good karma means happiness. Consequently, we find that Santa is always represented as smiling, jovial and happy - a perfect embodiment of the quality of generosity and kindness, and the resulting happiness!
Additionally, Santa is also a symbol for karma. In order to actually get the requested gifts from Santa, we have to be good boys and girls. The baddies won't get any gifts! Likewise, only when we generate lots of good karma ('puñña') will our wishes become reality.
But it's also important to generate wholesome aspirations: We have to be judicious what to put onto our wishlist. We don't want to waste all our good karma for getting only superficial things like material riches. Instead, be better aspire for spiritual qualities like kindness, virtue, mindfulness, wisdom and knowledge.