Campaign funds reality

Okay, since Hillary Clinton has raised the largest amount of money today for her campaign and Mitt Romney is closing in on $ 100million raised, with Guillani not far behind, why can't they take 1 month & go raise money to get our Homeless in permanent shelters. Big business, the wealthy ones, wants to shell out, but not for the tired and poor. Guess the downtrodden can't pay back favors.