In case people are interested, Wikimedias Deutschland and France have received similar questions from Sue and have posted their responses on meta:
http://meta.wikimedia.org/wiki/Fundraising_and_Funds_Dissemination/Payment_p... http://meta.wikimedia.org/wiki/Wikimedia_France/Fundraising_letter_March_201...
I see from the minutes that WMUK's board discussed their response at their meeting on Saturday, so I presume the final version of that will be going up on meta very shortly.