First of all, an embryo is NOT a human being. A potential human, yes. But 'being' it is not.
So, by that definition of cannibalism (besides Shaggy's much more fun example), then I'll have to admit to being a cannibal if I receive an organ transplant in the future? Interesting.
It is my understanding that Shaggy is also right about the funding -- it would come through university programs, medical schools, etc., so there would be potential taxpayer contributions that way.