This has occurred to me several times before, although I've never had anything like the sort of contacts one would require to buy 14,000,000 tickets. Also, I was under the impression that the UK national lottery forbade any given syndicate from buying more than some large number (on the order of 10,000) tickets, but I can't seem to find it anywhere in the rules on their website.

There are, of course, also some practical issues with buying 14,000,000 tickets: you'd need to pay an army of people to go out and buy them, and somehow sort out a system for making sure you don't miss any (although there are some lotteries where you can buy tickets online, which might make things easier). The Euro-millions seems to fairly regularly have positive EV draws, although this has never tempted me to buy a ticket.