It is the other way around. If you are doing effective altruism, you want to make sure you have money coming in that you can be altruistic with.

The bit about Walmart was especially badly done. If the author of this article thinks Walmart employees are poor on the same scale as the poor that the foundation targets, he really has no clue about world poverty. If the minimum standard of living throughout the world were equal to that of a typical Walmart employee, the world would be tremendously better off.