To paraphrase: "Even so, the Supreme Lord and Sovereign of the universe ordained, commanded, and arranged for the support of those who proclaim the gospel." If anyone wants to argue with Jesus Christ (Matthew 23:23), that is his prerogative! He is the One who established the tithing system.
Today's Dictionary of the Bible, page 624, states the following:
Every Jew was required by the Levitical law to pay three tithes of his property: 1. one tithe for the Levites; 2. one for the use of the temple and the great feasts; and 3. one for the poor of the land. It cannot be affirmed that the Old Testament law of tithes is binding on the Christian church. Nevertheless, the principle of this law remains, and is incorporated in the gospel (I Corinthians 9:13-14); and if, as is the case, the motive that ought to prompt to liberality in the cause of religion and of the service of God be greater now than in Old Testament times, then the Christian ought to go beyond the ancient Hebrew in consecrating both themselves and their substance to God.
The commentators recognize the tithing principle in the New Testament. They may not admit adherence to the law of tithing or that a Christian must live by this law today, but at least they recognize the requirement to care for exactly what God had established.