The philosophy will help a ton with law school -- I don't know how much with getting in, but the skills you learn as a philosophy student are key for being a good law student. Plus, if you study a little Sartre or Nietzsche, you're really good at cocktail parties
As far as working for a few years, I don't see how philosophy could hurt. You learn critical thinking skills, and most employers like those sorts of things. Econ won't hurt you at all in either endeavor, and will probably help.