I’d assume same reason most politicians are. In a capitalist society, those that pool the most money will tend to gain the most power and influence. So the churches that talk to the rich man and say “of course god is blessing you because you are such a good person” get more money, and thus more influence, than the churches that pay attention to the “It’s harder for a camel to pass through the eye of a needle than for a rich man to get into heaven”. “Succesful” religious leaders become the ones to teach the next generation of religious leaders. Causing more drift into the same idea.

Then of course the pro-corporate candidates also do really good virtue signaling. Because when the religious leaders do not want to focus on the Rich, they still need a bad guy to rally against, and since nobody needs the church to tell them murderers and thieves are bad… the church takes a more strong stand against things that are accepted by society that they can consider against their faith. (abortion, LGBT etc…)