> Why does a hill billy who insists on living at the bottom of the Grand Canyon deserve a subsidy?

I'm going to say this nicely once instead of the reply I really wanted to say because I'll give you the benefit of the doubt of not knowing or looking it up.

Because it provides postal service to the Havasupai people living on their native land at the bottom of the Grand Canyon. Would you like to take a guess as to why Supai, Arizona, the capital of the Havasupai Nation, is located at the bottom of the Grand Canyon.