Asking for help

Found this on a FB page:

One of the things I have noticed over and over at the churches where I have pastored is the unfortunate cases of the church's benevolence being abused. This happens in many ways, but the main ways I have witnessed this happen is the same people will repeatedly attend one church in the area, but repeatedly go to another church in the area to always get help and they will not attend the church or give back to the church. On the alternative, I have witnessed people who will repeatedly go to multiple churches in area to ask for help, but never attend the church or give back to the church. What scripture would you use to teach your congregation that these things are wrong and policies need to be established to try their best to prevent this from happening? I know the church will never be able to weed this out completely.

So how would you answer?