They were pleased to do it, and indeed they owe it to them. For if the Gentiles have shared in their spiritual blessings, they are obligated to minister to them with material blessings.
KJV
It hath pleased them verily; and their debtors they are. For if the Gentiles have been made partakers of their spiritual things, their duty is also to minister unto them in carnal things.
ASV
Yea, it hath been their good pleasure; and their debtors they are. For if the Gentiles have been made partakers of their spiritual things, they owe it to them also to minister unto them in carnal things.