ministers of the gospel should be maintained by the people, to whom they are ministers

MINISTERS SHOULD BE MAINTAINED BY THE PEOPLE TO WHOM THEY ARE MINISTERS

Who at any time serves as a soldier at his own expense? Who plants a vineyard and does not consume the fruit of it? Or who shepherds a flock and does not consume the milk of the flock? (1 Corinthians 9:7)

Matthew Poole:

Who goeth a warfare any time at his own charges?
The work of the ministry is a warfare, the minister’s work in that age was so in a more eminent manner, as the opposition to those first ministers of the gospel, both from the Jews and from the heathens, was greater than what ministers have in later ages met with. Now, saith the apostle, none that lists an army, expects that his soldiers should maintain themselves without any pay.

Who planteth a vineyard, and eateth not of the fruit thereof?
It is like the planting of a vineyard. The church, in Scripture, is called a vineyard, Isaiah 5:1–2. The plants are the Lord’s, but he useth ministers’ hands in the planting of them: none planteth a vineyard, but in expectation of some fruit; none employeth servants to plant a vineyard, but he resolveth to uphold them with food and raiment, while they are in his work.

Or who feedeth a flock, and eateth not of the milk of the flock?
The church is compared to a flock: saith the apostle: No man feeds a flock, either personally, or by his servants, but he eateth, or alloweth his servants to eat, of the milk of the flock.

By these three instances, commonly known amongst men, the apostle showeth the reasonableness, that the ministers of the gospel should be maintained by the people, to whom they are ministers.