If Romney is so worried about America, why doesn't he run as an independent?

Like Ross Perot did. I mean why risk any of your money on a Primary system that you might not win. Hip Mitt must be aware of the Cat Stevens lyrics, "Hard to get by, just upon a smile, girl(added on purpose)." I dont want Mr. Romney going on welfare, or anything like that. I just wouldn't be able to sleep at night, knowing his family might be going hungry.