Leaders should avoid emphasising the deficit as much as possible as a country like the UK cannot go bankrupt whilst deficit reduction reduces the economy in the private sector, particularly if the cuts are badly-targeted. That said there is a cost to letting it grow too high, which is why some sensibly-targeted measures should help make it easier to control without forgetting that most deficit reduction happens when the economy improves and tax revenue increases and expenditures on the safety net diminish. The problem is that talking about the deficit causes a false crisis, though I can understand that it would be difficult to cut anything or increase taxes without a "good reason"... and that means talking about this deficit.