Olympics - oooo, that'll cost you

It's been announced that the cost of London hosting the Olympics has risen to £3.3 billion. Considering the fiasco that is Wembley, I suspect that this figure will increase a few more times before the first shotput is thrown. Just to put that into perspective, the 2005/2006 Government deficit was £36 billion. So the Olympics, so far, will cost the country around 9% of the deficit. They are going to have to sell a lot of hot dogs and 'Mind The Gap' t-shirts to make this thing worthwhile aren't they?