> Yes, usually the solution is clamping down on immigration...
That's not a solution more than a choice not to face a problem.
> It does not create such pressure. As said, it only creates pressure to implement tougher rules on immigration.
Seeing people suffering all around you does create social pressure, in normal human beings, at least. I'm not trying to be trite here, but I don't think you really can deny that people seeing other people suffer inspires them to give.
> And it certainly does not help the countries of origin, which see their working age population leave and help a foreign economy instead of staying and helping the country.
Immigrant workers often send money home that far exceeds what they could ever make if they stayed. And they often do come back, after saving enough to retire, enriching their culture with western ideas as well.
> Again, Africans need to help themselves at home. No-one will or can develop African countries but Africans (the same goes for all countries, not only African ones).
Will you take a second to look at what you're saying? You might as well be talking about any group in need, ex. No one will or can help the homeless, but themselves. No one will or can help the disabled but themselves.
People can help other people, and often do. All you're doing here is basically saying “Everyone only for themselves” only you've cut the dividing lines by country. You might as well cut it by race, or social strata, it amounts to the same thing.