Continuity mistake: Josh is wishing Donna a Happy Thanksgiving - he is eating something out of his hand and has a blue book tucked under his arm, which flips from front to back from one shot to the next. When he starts talking to the Trekkie, it flips back again.
Continuity mistake: When Josh is recapping his conversation with Jack to Donna, as he is walking towards the coffee pot he his putting a pen in his shirt pocket. When they turn to walk back to his office the pen has disappeared. (00:24:50 - 00:25:50)
Answer: It's in reference to the many televangelists and revival ministers usually associated with the right-wing that have been convicted of tax fraud (Jim Bakker and Tamy Faye being a more famous set). Occasionally, the more unscrupulous ministers have bilked millions from believers all in the name of God.
Nikki