As a Canadian, it seems to me that Americans don't mind people being successful in business: a land of opportunity, etc.
But a preacher that is monetarily successful is another matter: if donations are truly charitable, they need to be accounted for carefully. By the very nature of the discourse that a preacher supposedly identifies himself with, he is supposed to be counted among those who are 'pilgrims and strangers on the earth' (Hebrews 11).