OP told an unsourced story about a supposed SF housing project cancelled because of supposed demands for low-income units. You appear to have uncritically accepted this story as true, to the point where you are ranting about the injustice and immorality of those pesky poor people demanding an affordable place to live. You are demonstrating my observation that many people are inclined to accept the viewpoints and arguments of the rich and powerful without question or examination.

Even if such a development existed, I would not take the word of the builders that it was annoying poor people that doomed it, without taking a closer look all the things that can cause such a project to fail, including the competing actions of other greedy rich people.