As other posters have pointed out, many nations are poor because economic factors are set up to keep them that way. One of the reasons that Cuba fought so hard to push out capitalist industry was because wages and living conditions were kept artificially low by multiple companies working together; a situation that's occurring in many other places across the globe right now. It's not that these countries are at their limit, they are starving because they cannot use their own resources to their fullest extent. Once every country is fully developed and we are still running out of food, that will be the point when someone can legitimately bring up mass starvation as the possible solution to anything.
Not that such a point will come around. With 7 billion people working to solve the resource problem, we will find solutions that seem to be impossible with our current brainpower.
There is a basic concept, if you have a resource, trade it for a resource you do not have, and that includes money. If there is an entire nation that has no resources to trade and they are not capable of growing their own food, then the population will starve, the population will go down, and things balance out. Helping rebuild after a natural disaster is one thing, but if after 20+ years a country can't recover, then why should we continue to help? The world as a whole does not need money pits, and the world as a whole does not need a "food pit" that will never be able to trade resources for food.
The UN and other countries aren't working now. Keeping people in camps, selling food that undercuts the local farmers and deploying troops that end up raping the locals but cannot be charged due to immunities isn't helping. There's no political will to actually work to fix these problems because the solutions don't look particularly appetizing from a moment's look. For example, if the UN worked to shoot the warlords and bandit kings causing destruction by rampaging through their respective countries, the first thing those warlords would do is scream about how the west was imposing their oppressive cultural values onto them against their will, much like how you are doing right now. Likewise if the UN had harsh and immediate penalties for soldiers caught taking advantage of the locals in their battalions the countries providing those soldiers would likely withdraw support from the UN and make a fuss about their rights being violated.
Helping people in your own country would make far more sense, since if you can elevate THOSE people out of poverty, they may be able to become productive and to add value to society as a whole. If you want to adopt people and bring them into your own country, then fine, bring them in, and make them productive.
This argument has been around a long time for everything from the space program to R&D. So has it's counter. "You didn't do shit for those people before we started doing x, and you're not planning to do shit for them if x stops, so cut the crap."
What's my solution? Laws need to be passed that prevent corporations from taking advantages of countries that they outsource to; these laws need to have teeth. Corporations always complained about new labour laws, from equal pay to child exploitation legislation; they're going to cope just fine. More importantly the influx of capital will allow the countries being outsourced in to more fully develop their economies. The UN should make an effort to sell food at just a higher price than local farmers in poor countries in order to insure that the local industry doesn't go bankrupt every time they visit. Free surgery is good, but no one's going to start any farms as long as you're going to pop by and undercut them on a bi-yearly basis. The UN army needs to be disciplined properly to prevent the current abuses against the people they're supposed to be protecting and then cut loose to deal with the bandit problems. There's local culture and then there's mass murder and we need to have a global understanding that the second is not just a funny thing that those people do but a blight to be stamped out brutally. Those suffering nations are quite capable of having the same food production as western nations.