Why don't they research students before giving them free or reduced lunch at school?

As someone who works in schools, I've observed schools that give students' families forms to fill out for free or reduced lunch and there is no research done on those forms to verify information. More and more families falsify this information so that their children can qualify for free or reduced lunches. I don't want children to go hungry, but when I see children get free lunch and they are wearing the newest and most expensive fashions, and their parents drive Escalades and Hummers, it is quite obvious that these families have the means to feed their children. Also, these are the children that come to school with dollars in their pockets to spend on french fries and cokes at lunch and end up throwing their free lunch in the trash. On the other end of the spectrum, I also see children whose parents are hard workers at bottom level jobs, they drop off their kids in their old cars and pickup trucks, their children wear more basic clothes, and these parents are too proud for istance and send their children to school with lunches from home. It's interesting that these children are hard workers in cl and don't cause disciplinary problems, whereas the other children are usually the ones who refuse to do their work and disrupt the cl with their inappropriate behavior. Maybe the food should just be free for everyone then? Or maybe we should investigate these claims of low income and have consequences to deter the falsifying of this information? I'm really concerned about this because tax dollars are dwindling, children are hungry, and this waste of food and money is too monumental to ignore.