Many Africans in the west also live on tax dollars i.e. welfare, public assistance, government help or what have you. So any tax dollars Africans pay to the system are just a drop in the bucket to what you draw out of the system. Indians and other immigrants do not fall into that category. We are a net benefit to the west and to Africa as it turns out.
Has it ever occurred to you that India has a larger population than America so you can't just compare the total number of poor people? As far as Indians living in other places, it is no different to Europeans or Americans living in Tanzania. It doesn't disprove what I said. The point is we are helping Africans. Without our help you would starve to death or migrate en masse to other countries.
Look at any major scientific research institution in the west be it academic or industrial, you will see many Indians. Our contribution has been and is continued to be made. What comes out of scientific breakthroughs and research has helped Africans. There is no denying that. Just a little appreciation from you would be appreciated. Don't be that spoiled, ungrateful little brat in the example I gave you in another thread.