The point about the money markets is what I dont think many people understand. Countries, like most big businesses are run on the basis of revolving credit facility, which allows investment. The rate that they borrow at is governed by the likes of Moodys who give countries a ratings.
The UK used to be AAA (the best you could get), now its only AA, the lower the UK growth is in terms of trade and the worse the debt burden becomes, the lower the rating and the higher the UK is charged for borrowing on international money markets.
Whilst the government has massively mismanaged public finances and wasted billions, there is no magic money tree, quantitative easing (printing money) eventually has to be paid for and if the economy fails to grow sufficiently then you're up shit creek, which is pretty much where we are.