I must admit that this is one of our (wife & self) concerns about retiring in the Philippines. Its bad enough on a holiday when distant relatives come out of the woodwork wanting a handout PLUS the expectations of closer family. Talking to many expats, its a common concern / problem. Best advice would seem to be:
* give / lend only what you can afford to lose and do not expect any of it back ever!
* as Keith says fund self sufficiency;
* give to only close family members;
* give once and once only with the sole exception of genuine medical emergencies.
I might also add:
* do not startup a business in the Philippines either by yourself or in partnership;
* do not get involved in any land / property arrangements / deals with family;
* do not let family look after / use your Philippine house when you are back in the UK / abroad.
I've probably heard enough horror stories to write a book!
Hope this helps,
Nigel