Andem - 4:48 am on Dec 21, 2012 (gmt 0)
This plan will fail as did the gifts programme Facebook recently discontinued. The Facebook gifts were novelty and some people didn't mind paying $1 to send a small animated GIF to their friends.
Paying to send personal messages alienates not only Facebook users who are forced to pay, but also the users who receive pay-for messages.
If you should be able to contact somebody at some company, university or institute, then you can find a way easily. If not, then you shouldn't be able to "pay to spam" or bug this person.
Since my other half is among a group of experts and advisers to political leaders, I take great offense to this entire concept. (Though good luck finding ANY of them on Facebook, even if they did have accounts).