You're welcome. I think this is difficult to understand if you haven't experienced it,
If you are a true partnership that £400 is your household money. You need to know what it's for. If they are well-dressed it doesn't look like they need 'essential living' money.
Currently you don't know anything, people beg for 'urgent money' and your DP happily sends it.
But again, you have no way of finding out - as you'll only know what your DP tells you. Unless you know other Pakistani people it's not the sort of thing you can Google.
The only thing you can do is stop sending the money and let them sort themselves out. Or, if your DP is that concerned, he can stop his pension and send the extra to them instead.
If you also think how is this going to work... He's been here for years so he's sent his adult kids + siblings money for a while. That's two generations of people he's been supporting.
It hasn't made a difference has it? The kids are adults and now still needing 'support'. So he will be paying for them all their lives... and it will never end.
I'd have some sympathy if they said money for school fees, kids to grow up and get good jobs, that they can then support themselves. Or start a business. buy some property but this doesn't seem to have happened. They just want handouts.
I have sent money back, my own family got help from other growing up but the money was 'seed' - to eventually improve ourselves to the point where we are comfortable now. That's how it's supposed to be but many other families just think the person abroad is meant to support them forever and they should just sit around eating, drinking and bragging to their friends, spending the money mindlessly.
If God forbid he gets ill and unable to work what are they going to do???