I looked up the word "mahadayā" (มหาทะยา--มหาดไทย?) in the Digital Pali Reader's dictionary. "maha": an orchestrated festival, a great affair,... and "dayā": sympathy, compassion, kindness,... "mahadayā": an orchestrated affair of compassion and kindness, -- a true meaning for 'public service'. What else could a government office be given a name of such characters but มหาดไทย and 'your' public health work?
Errr good morning ;-)