Read the verse again. Also look at 2 Cor 9:13. It goes into more detail and again, separates those that are of the faith and those that are not, being helped. In this case, he states that this help comes from the distribution. The same kind of distribution given to the widows and Christians.

6 But this I say, He which soweth sparingly shall reap also sparingly; and he which soweth bountifully shall reap also bountifully.
7 Every man according as he purposeth in his heart, so let him give; not grudgingly, or of necessity: for God loveth a cheerful giver.
8 And God is able to make all grace abound toward you; that ye, always having all sufficiency in all things, may abound to every good work:
9 (As it is written, He hath dispersed abroad; he hath given to the poor: his righteousness remaineth for ever.
10 Now he that ministereth seed to the sower both minister bread for your food, and multiply your seed sown, and increase the fruits of your righteousness)
11 Being enriched in every thing to all bountifulness, which causeth through us thanksgiving to God.

12 For the administration of this service not only supplieth the want of the saints, but is abundant also by many thanksgivings unto God;

13 Whiles by the experiment of this ministration they glorify God for your professed subjection unto the gospel of Christ, and for your liberal distribution unto them, and unto all men;

14 And by their prayer for you, which long after you for the exceeding grace of God in you.
15 Thanks be unto God for his unspeakable gift.