As Gilmour sits in one of his mansions.
Well, not to be too much of a kill-joy here, but David Gilmour actually IS quite involved in charity work, in fact he sold one of his homes in 2003, and donated the procedes (nearly $6,000,000, IIRC) to homeless charities. It seems that he also plays wuite a few charity gigs.
Something to keep in mind is that not everyone involved in charitable giving actually publicises it.
Mark