The rule is out of good heart, but only works for developer with a big piece of land or several parcels close to each other. t For those had to squeezed in the requirement unit into the same building, he ultimate bitter is swallowed by the consumer.

High count residence already lead to high probability of rat among the good. Now you mix lower income people in regardless the market segment of the product.

Imagine you work your ass off to live in a quality environment, only to know that you have a few slums at lower floor or facing the cemetery or whichever less appetite direction... This really getting like those sci fi movie...