I think the answer to this question is dependent on how people see the work of a pastor.
Pastors do two things, they serve as spiritual leaders and they preach the word of God. Effectively, they show people the way to God and they bring God to people. Churches get income from donations from church members and people who are looking for spiritual guidance, how much of that money goes to the pastor is unique to every church. Some pastors own their own churches and as such, are in charge of the church funds while others are in charge of smaller branches and receive salaries from the main church.
The thing is, I don't think pastors are supposed to be paid in the first place, preaching the word of God is not a business and a salary shouldn't be on the cards. Even in the time of Jesus Christ, preachers had day jobs, all of Jesus's disciples had jobs and in truth they gave far more than they received. These days pastors exploit people and they do so by telling them what they want to hear, "Sew a seed and God will answer your prayers",. "You need to tap from the annointing of the lord by giving something substantial to God", "The lord is talking to me!!! He said that there are people that're here that are looking for jobs, if you're among these people, come out and sew a seed now or else your job will not come". The thing is you never actually here that these churches are doing something for the people, all they do is take from the people.
There are actually pastors that guide their people spiritually, they show their congregation what they feel is the right way to God and whether or not their wealth is as a result of God's blessing or their ability as motivational speakers is beyond me, but if I'm being honest, I don't think pastors deserve to be as rich as they are, at least not if it's at the expense of the people they're supposed to be leading. The service they render doesn't commensurate with their wealth.
Anybody can stand on a podium and give people motivational speeches and that's exactly what pastors do, the only thing they do differently from motivational speakers is that they invoke the name of God and demand that people pay them for their words. It's not right.
Let me end it like this, Jesus fed five thousand, he wasn't fed by five thousand. The work of a pastor is to help his congregation, not profit off them. The work of a pastor is supposed to be pro-bono, and as they say in Christianity, their reward is in heaven and not on earth.