No you're making out that I made a generalisation when I didn't.
You live in a first world country generally have it great and therefore if a natural disaster happens in a poorer country, people donate solely for the benefit of people in the other country. This is obvious with live aid and all the natural disasters recently.
The idea that this will work the other way is pretty laughable, how many people in Africa donate to homeless charities in the UK? Undoubtedly homeless people in the UK have a crap time, but they've got enough on their plate as it is and they probably think that it's a problem for the UK to deal with.
"You see here is the problem" you're not looking at the specific case of money being donated from a poorer country into Britain, it's just not going to happen.
If the RNLI wants to completely change it's raison d'etre and be a charity that works as an international lifeboat charity then I fully accept that it would receive donations from all over the place, but it's not. As has been pointed out in this thread 98% of it's funding is spent on helping the British, why would a French person donate £1, 2p of which could potentially help people off the french coast? The same question with Americans, Brazilians, Australians, Somalians, Chinese? The answer is they wouldn't.