Are you saying that illegal aliens don't shop, buy food, clothing, or in any way spend money that stimulates the economy?
I'm willing to bet there are countless Mom & Pop grocery stores in LA, that might be hurting for business.
I betcha they'd want illegal aliens shopping in their stores giving them business, purchasing American made goods from their shelves that keep American workers employed. You can't cut your nose off to spite your face. Like it or not, part of the population is made up of illegal aliens. The more money they have, the more money they spend, and the more it stimulates the economy, keeping people employed, and keeping businesses and manufacturers in business.