Tim Coates believes that most public librarians' CILIP subs are paid by their employers. I think he's wrong. There's only one way to find out: vote!
It's not especially scientific, but it's a start. I'd be interested to see the consensus across other sectors as well as my current domain.
Update: thanks for the impressive response, and for going easy on me and my shoddy methodolgy! The results so far are here - scroll down for numbers. There are some really useful comments as well.