In his Galatians commentary on this verse Martin Luther writes,
"Next to the preaching of the Gospel, a true and faithful pastor will take care of the poor. Where the Church is, there must be the poor, for the world and the devil persecute the Church and the impoverish many faithful Christians.
Speaking of money, nobody wants to contribute nowadays to the maintenance of the ministry, and the erection of schools. When it comes to establishing false worship and idolatry, no cost is spared. True religion is ever in need of money, while false religions are backed by wealth."