Contrary to some of the vacuous bullshit you'll find on this page, philosophy is a noble, no, possibly THE most noble academic discipline one can study. Sans repeating what our friend correctly said about the five major fields, I will say this: We live and die for philosophy. Even if we don't realize it, nearly everything we believe is predicated on someone's philosophical investigations. To debase the mother of all sciences as a "waste of the taxpayer's money" is to admit barefaced ignorance.
Oh yeah, and philosophy majors score higher than any other majors on the graduate exam; mathematics students come in second. Maybe they're doing something right.