Sadly this isn't really the case. Africa is an extremely complicated continent absolutely rife with corruption. The average joe on the street knows this, and have zero faith in their governments so will generally disregard anything the gov says or does and just forge their own way in life whilst their governments pilfer and skim everything they can.
Then you've got all the corrupt charities who are constantly sending "aid" to Africa in many forms, old computers, clothing, they'll build schools, water treatment plants, you name it. The money ends up being squirreled away by the many, many hands it has to pass through to get to the actual people who need it, whilst the western aid charities have now ticked their box and the resources have crossed the border so as far as they're concerned, their work is done. It's a topic that is very close to my heart and one I follow rather avidly as I absolutely detest the charities who milk peoples' kindness and generosity and then use every loophole in the book to skim as much as they can off the top.
Here's a few examples of what actually happens, compared to what the charities will tell you:
Computers "donated to schools":
Clothing that is "donated to the poor people of Africa":
Madonna's "school built for African girls":
https://face2faceafrica.com/article/madonna-s-abandoned-school-in-malawi-to-become-a-cemetery
I could find more but I'll leave it at those for now. One of the best ones was when someone built a well and water filtration facilities at various schools (think it was Kenya, can't remember) to help the locals with their sanitation systems and so they didn't have to walk a few miles a day to get water, but once that person left the wells were promptly either abandoned or stripped of anything useful and repurposed to build homes and stuff as the wells and filtration plant not only required filters at $500 a pop every month, but also kept breaking down.
The West's patronizing attitude towards Africa really irritates a lot of Africans, who are very proud people from long lines of ancestry who have fought in wars and decapitated their foes over the centuries. And now some western pop star comes and builds some wells for them in their Hugo Boss outfits and Rolex watches? It irritates the hell out of them, and it would me too. But very few people actually go there and say "what can we do to improve your lives?", they simply do whatever the most fashionable thing is at the moment, get their moment in the papers and move on with life, leaving these communities to clean up whatever patronizing crap they've left behind.
Don't get me wrong, a lot of charities are actually really good and know what they're doing, but it's an industry absolutely rife with fraudsters, con artists and thieves.
Another fun one on a slightly different topic is a charity who support the research of cancer. I won't say their name but it's fairly obvious. A local Ford dealership donated a few cars to them one year so they could use them to raise funds. What did the charity do? They kept the cars and raffled them off for staff in a Christmas raffle, and amazingly, none of the floor folks won a car, it was all the managers. How does that work then?
That's my little sermon for the day, tl;dr: do your research before giving to charity