The pie is sliced thinly and each contribution gets a slice... not contributor.

One slice for production,
One slice for writing,
One slice for performace,
One slice for arrangements,
etc, etc, etc..

So for a song like say, Comfortably Numb, Mr Gilmour and Mr Waters would get about three or four slices each (Writing, performing, arrangement, production....)

Oh yes, then lets not forget about the publishing rights, performance residuals, ...ugggghh

It's a complex and messy process... that's why you see so many damn Lawyers and Accountants running around record comapny offices.

When last I heard I believe Mr Gilmour was edging out Mr. Waters by a few hundred K...but they both are wealthy enough to not worry about it much...

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I have always been here.
I have always looked out from behind these eyes.