It is clear that many churches are not about the people and the mission, but about making revenue; a "non-profit", tax-free corporation. God never intended for this. Nevertheless, there are those churches whose whole motive is not to build a cathedral, or a facility, but to get to lost souls.
Money is needed to reach souls. In some denominations, the tithe does NOT stay in the church, but goes to a central body, where it is divided for different purposes, but mostly to pay honest salaries to the pastors and further the work. Only the offerings stay in the church to pay for the church expenses. This prevents this type of thing happening. Kenneth Copeland, Benny Hinn, and many other mega church "ministers" are nothing more than thieves. What is worst is that they aren't just stealing from people, but from God Himself.
It is sickening and sad that the same thing that sparked the reformation is what is happening now. Taking money from the poor, uneducated peasants to give to the greedy who have too much. I was reading Luther's 95 theses yesterday and it seems like in a way this is what's going on today. Only people now do not have time to read the Biblical Truths, while before, people just didn't have the Bible.
The tithing system does work and it does have a Godly purpose, but like many other Biblical doctrines, they are twisted for the economic profit of false prophets, making people despise Christianity, the church, and God Himself.
EDIT: I should included the purpose of the tithe.
6 “I the Lord do not change. So you, the descendants of Jacob, are not
destroyed. 7 Ever since the time of your ancestors you have turned
away from my decrees and have not kept them. Return to me, and I will
return to you,” says the Lord Almighty.
“But you ask, ‘How are we to return?’
8 “Will a mere mortal rob God? Yet you rob me.
“But you ask, ‘How are we robbing you?’
“In tithes and offerings. 9 You are under a curse—your whole
nation—because you are robbing me. 10 Bring the whole tithe into the
storehouse, that there may be food in my house. Test me in this,” says
the Lord Almighty, “and see if I will not throw open the floodgates of
heaven and pour out so much blessing that there will not be room
enough to store it. 11 I will prevent pests from devouring your crops,
and the vines in your fields will not drop their fruit before it is
ripe,” says the Lord Almighty. 12 “Then all the nations will call you
blessed, for yours will be a delightful land,” says the Lord Almighty.
God does not change, and his decrees have not changed. The tithe is necessary for the sustenance of his ministers and the work. that is why God says in v. 10,
Bring the whole tithe into the storehouse, that there may be food in
But there has to be a fair distribution of the tithe. The pastor in a rich area should not make more than the pastor in the poor area. Also, if the tithe is kept by the pastor, this motivates the pastor to preach what pleases the members instead of the plain Biblical truths.