Pat's income from his mega church and gifts in kind are taxable.
I'm not saying he's a good person, but he has personal income just like the rest of us. The odd clergy exemptions to the personal income tax are not that large: https://www.irs.gov/taxtopics/tc417
And like the rest of his fellow mega-wealthy, he'll be able to fiddle it away in a number of ways.
The flights (and dinners, and cushy hotels, and big parties) will be for "church business". The "fair rental value" of his home will be immense, and "reasonable compensation for the minister's services" will be something the IRS is reluctant to fight over.
I'm not saying he's a good person, but he has personal income just like the rest of us. The odd clergy exemptions to the personal income tax are not that large: https://www.irs.gov/taxtopics/tc417