Where several directors are £100k or thereabouts, and the chief exec takes £150k+, from a charity, it's not one I will support. Charities are entitled to pay that if they wish, and they may or may not be "fat cats", but my view is that it's unsupportable for a charity.
If you're happy to donate, knowing that, then good for you. But when it's my money I'm donating, it's my right to determine the criteria I use to determine who gets what ftom a limited pot, and my decision is that it'll do more good going where it doesn't require highly paid executives, or very expensive marketing campaigns.
Speak to people that run small charities and many will tell you it's hard get funds because massive campaigns from the "big boys" drown out their voices, and there's no way they can compete with that. So I choose to direct my limited support to where I think, pound for pound, it'll do most good and my view is that that's small, local charities that aren't funding expensive offices, expensive marketing efforts, and executive salaries of the order paid by many big charities. The big boys do pretty well without my little bit, and those struggling smaller charities really appreciate direct help without all the overhead.