There is a difference between "gaining" and being able to live. I'm surprised that there are so many here who would allow ministers of God to starve to death and freeze in the winter. Sheesh.
I wouldn't want a minister to starve, but I don't think they should get a
salary. The tithe was for the minister precisely so that s/he would
not starve - because the tithe is 10% of the
increase given by God. Not mammon/dollars/money. This way, it didn't matter what happened to the economy, or inflation rates. The increase was given by God directly - like with crops, cattle, trees (for wood,) medicine, etc.
Then, the people would use their trades to provide and present 10% of their increase given by God. This could be using the 10% to make a house, or a week's supply of meat pies for the family.
The people were responsible for giving their tithe from God to the preacher in a presentable way (i.e. actually using/giving all of the 10%.) The preacher had no reason to make a salary because God was literally his boss, and made sure the preacher got what s/he and the family needed. It was humbling.
Today, preachers make salaries, receive tax-exempt donations, and tithes in the form of money (in addition to some Church fees and even erections being drastically discounted or free.) Preachers should be able to live at least megarly (depending on if you are single or family.) But, preaching was humbling. Having 200,000 members because you preach feel-good and/or non-offensive messages, buying a 400 sqft house and three cars, a gulfstream airplane, and a boat is not what preaching is about. I have heard the excuse, "Well, I need to
reach my flock, so I need a plane/boat/etc." Nah, that is oppulance; leave that to the people. The preacher is supposed to be a humbled, holy man that does not indulge in worldly pleasures no matter how minute.
This is especially the case when many in modern church pues are struggling and suffering financially, and the preacher/minister has all of his toys and dream houses telling his flock, "God wants you to be rich" or something of the sort. Culturally, morally and spiritually. that should be unacceptable to everyone who sees it. There are modern ways of spreading your ministry across the world. Missions are a prime example - ministers don't need gulfstreams. Your flock should help you get there, and the minister can even encourage some of them to come. You don't need a gulfstream 6 of your own.
So, nope I don't think a preacher should get a salary. Plus, it weeds out people who want to be a rockstar: "Will you spread the gospel because you can gain 10,000,000 people worldwide + money + trips... or will you spread the gospel because you want to and love God and people - no matter what is on your back or in your pocket?" What the real preachers should do is ask their a member of their flock to build them a house if they want it. I know several people who have said, should they be preachers, would be perfectly fine sleeping at the church (usually even small churches have a little room for the minister to sleep.) Your reward/salary should be being honored to be charged to be a minister for God to His children. Do you think prophets deserve a salary at all (per prophecy or rolling salary)? I'm serious.